Air conditioning apparatus and electric control box

ABSTRACT

The electric control box includes a box body, a mounting plate, a radiator, an electronic component and a cooling fan; the box body is provided with a mounting chamber, the mounting plate is arranged in the mounting chamber and the mounting chamber forms a first chamber and a second chamber which are located at two sides of the mounting plate, the mounting plate is provided with a first ventilation opening and a second ventilation opening which are spaced apart, the first ventilation opening and the second ventilation opening enables communication between the first chamber and the second chamber; the radiator is at least partially arranged in the first chamber; the electronic component is arranged in the second chamber and is in heat conducting connection with the radiator; and the cooling fan is used for supplying air.

CROSS-REFERENCES TO RELATED APPLICATIONS

The present disclosure is a national phase application of InternationalApplication No. PCT/CN2021/114353, filed on Aug. 24, 2021, which claimsthe priority of the Chinese patent application No. 202010872932.0, filedon Aug. 26, 2020, and the Chinese patent application No. 202110170415.3,filed on Feb. 8, 2021, the entireties of which are herein incorporatedby reference.

FIELD

The present disclosure relates to the field of air conditioners, and inparticular to an air conditioning apparatus and an electric control box.

BACKGROUND

Generally, in order to cool down an electric control box of an airconditioning apparatus, a heat dissipation hole may be defined in a boxbody of the electric control box and communicate with a mounting cavity,and air inside the control box may be exchanged with air out of thecontrol box through the heat dissipation hole to cool down the electriccontrol box. However, defining the heat dissipation hole in the box bodymay reduce air tightness of the control box, impurities, such as waterand dust out of the control box, may enter the mounting cavity throughthe heat dissipation hole, and electronic components arranged in themounting cavity may be damaged.

SUMMARY

According to some embodiments of the present disclosure, an electriccontrol box is provided and includes: a box body, defining a mountingcavity; a mounting plate, received in the mounting cavity, and themounting cavity is divided into a first cavity and a second cavitydisposed on two sides of the mounting plate respectively; the mountingplate defines a first air vent and a second air vent spaced apart fromthe first air vent; and the first air vent and the second air vent arecommunicated with the first cavity and the second cavity; a heatdissipation member, at least partially received in the first cavity; anelectronic element, received in the second cavity andthermal-conductively connected to the heat dissipation member; and acooling fan, configured to supply air to drive air in the first cavityto flow into the second cavity through the first air vent.

According to other embodiments of the present disclosure, an airconditioning apparatus is provided and includes an air conditioning bodyand the electric control box as described in the above. The electriccontrol box is detachably connected to the air conditioning body.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are incorporated with the specification andform a part of the specification. The drawings illustrate embodiments inaccordance with the present disclosure. The drawings and thespecification are cooperatively described to illustrate embodiments ofthe present disclosure.

FIG. 1 is a structural schematic view of an air conditioning systemaccording to an embodiment of the present disclosure.

FIG. 2 is a structural schematic view of a heat exchanging body of aheat exchanger shown in FIG. 1 .

FIG. 3 is a structural schematic view of single-layered micro channelsand multi-layered micro channel shown in FIG. 2 .

FIG. 4 is a structural schematic view of a fluid-collecting tubeassembly in the heat exchanger shown in FIG. 1 according to anembodiment of the present disclosure.

FIG. 5 is a structural schematic view of a fluid-collecting tubeassembly in the heat exchanger shown in FIG. 1 according to anotherembodiment of the present disclosure.

FIG. 6 is a structural schematic view of a fluid-collecting tubeassembly in the heat exchanger shown in FIG. 1 according to stillanother embodiment of the present disclosure.

FIG. 7 is a structural schematic view of a heat exchanging body of aheat exchanger shown according to another embodiment of the presentdisclosure.

FIG. 8 is a perspective view of a first tube arrangement plane shown inFIG. 7 .

FIG. 9 is a structural schematic view of a heat exchanging body of aheat exchanger shown according to still another embodiment of thepresent disclosure.

FIG. 10 is a structural schematic view of the heat exchanger shown inFIG. 9 .

FIG. 11 is a perspective view of an electric control box omitting somecomponents according to an embodiment of the present disclosure.

FIG. 12 is a perspective view of the heat exchanger shown in FIG. 11 .

FIG. 13 is a perspective view of the heat exchanger according to anotherembodiment of the present disclosure.

FIG. 14 is a perspective view of a fixing bracket engaged with the heatdissipation member according to an embodiment of the present disclosure.

FIG. 15 is a perspective view of a fixing bracket engaged with the heatdissipation member according to another embodiment of the presentdisclosure.

FIG. 16 is a perspective view of a heat dissipation fixing plate engagedwith the heat dissipation member according to an embodiment of thepresent disclosure.

FIG. 17 is a planar view of a heat dissipation fixing plate according toan embodiment of the present disclosure.

FIG. 18 is a cross sectional view of a heat dissipation member engagedwith an electric control box according to an embodiment of the presentdisclosure.

FIG. 19 is a cross sectional view of a heat dissipation member engagedwith an electric control box according to another embodiment of thepresent disclosure.

FIG. 20 is a perspective view of a heat dissipation fin engaged with theheat dissipation member according to an embodiment of the presentdisclosure.

FIG. 21 is a perspective view of a heat dissipation fin engaged with theheat dissipation member according to another embodiment of the presentdisclosure.

FIG. 22 is a perspective view of a heat dissipation member according toanother embodiment of the present disclosure.

FIG. 23 is a planar view of a heat dissipation member engaged with theelectric control box according to another embodiment of the presentdisclosure.

FIG. 24 is a cross sectional view of a heat dissipation member engagedwith the electric control box according to another embodiment of thepresent disclosure.

FIG. 25 is a planar view of a heat dissipation member engaged with theelectric control box according to another embodiment of the presentdisclosure.

FIG. 26 is a cross sectional view of a heat dissipation member engagedwith the electric control box according to another embodiment of thepresent disclosure.

FIG. 27 is a planar view of a heat dissipation member engaged with theelectric control box according to another embodiment of the presentdisclosure.

FIG. 28 is a cross sectional view of the heat dissipation member engagedwith the electric control box shown in FIG. 27 .

FIG. 29 is a cross sectional view of the heat dissipation member engagedwith the electric control box according to another embodiment of thepresent disclosure.

FIG. 30 is a perspective view of an electric control box omitting somecomponents according to another embodiment of the present disclosure.

FIG. 31 is a perspective view of an electric control box omitting somecomponents according to another embodiment of the present disclosure.

FIG. 32 is a planar view of an electric control box omitting somecomponents according to another embodiment of the present disclosure.

FIG. 33 is a cross sectional view of the electric control box shown inFIG. 32 .

DETAILED DESCRIPTION OF THE DISCLOSURE

Embodiments of the present disclosure will be clearly and completelydescribed below by referring to the accompanying drawings in theembodiments of the present disclosure. Apparently, the embodimentsdescribed are only a part of but not all of the embodiments of thepresent disclosure.

The term “embodiment” in the present disclosure means that particularfeatures, structures or properties described in an embodiment may beincluded in at least one embodiment of the present disclosure. Thepresence of the term in various sections of the specification does notnecessarily mean a same embodiment, nor a separate or another embodimentthat is mutually exclusive with other embodiments. The embodimentsdescribed herein may be combined with other embodiments.

As shown in FIG. 1 , FIG. 1 is a structural schematic view of an airconditioning system according to an embodiment of the presentdisclosure. As shown in FIG. 1 , the air conditioning system 1 mayinclude a compressor 2, a four-way valve 3, an outdoor heat exchanger 4,an indoor heat exchanger 5, a heat exchanger 6, an expansion valve 12and another expansion valve 13. The another expansion valve 13 and theheat exchanger 6 are disposed between the outdoor heat exchanger 4 andthe indoor heat exchanger 5. The compressor 2 provides a circulatingcooling medium flowing between the outdoor heat exchanger 4 and theindoor heat exchanger 5 through the four-way valve 3.

The heat exchanger 6 includes a first heat exchanging channel 610 and asecond heat exchanging channel 611. A first end of the first heatexchanging channel 610 is connected to the outdoor heat exchanger 4 viathe another expansion valve 13. A second end of the first heatexchanging channel 610 is connected to the indoor heat exchanger 5. Afirst end of the second heat exchanging channel 611 is connected to thesecond end of the first heat exchanging channel 610 via the expansionvalve 12, and a second end of the second heat exchanging channel 611 isconnected to an air intaking port 22 of the compressor 2.

When the air conditioning system 1 is in refrigerating, a flowing pathof the colling medium is shown in the following.

An air outputting port 21 of the compressor 2—a connection port 31 ofthe four-way valve 3—a connection port 32 of the four-way valve 3—theoutdoor heat exchanger 4—the heat exchanger 6—the indoor heat exchanger5—a connection port 33 of the four-way valve 3—a connection port 34 ofthe four-way valve 3—the air intaking port 22 of the compressor 2.

A flowing path of the cooling medium in the first heat exchangingchannel 610 (a primary path) is as follows: the first end of the firstheat exchanging channel 610—the second end of the first heat exchangingchannel 610—the indoor heat exchanger 5. A flowing path of the coolingmedium in the second heat exchanging channel 611 (a secondary path) isas follows: the second end of the first heat exchanging channel 610—theexpansion valve 12—the first end of the second heat exchanging channel611—the second end of the second heat exchanging channel 611—the airintaking port 22 of the compressor 2.

For example, in the above case, a working principle of the airconditioning system 1 may be as follows. The outdoor heat exchanger 4serves as a condenser, and outputs a cooling medium having a mediumpressure and a medium temperature (a liquid phase cooling medium havinga temperature of 40°) via the another expansion valve 13. The coolingmedium in the first heat exchanging channel 610 has a medium pressureand a medium temperature. The expansion valve 12 converts the coolingmedium flow having the medium pressure and the medium temperature into acooling medium having a low pressure and a low temperature (the coolingmedium may be in a two phase of gas and liquid, and may have atemperature of 10°). The cooling medium in the second heat exchangingchannel 611 may have a low pressure and a low temperature. Thelow-pressure and low-temperature cooling medium in the second heatexchanging channel 611 absorbs heat from the medium-pressure andmedium-temperature cooling medium in the first heat exchanging channel610, and the cooling medium in the second heat exchanging channel 611 isgasified to sub-cool the cooling medium in the first heat exchangingchannel 610. The gasified cooling medium in the second heat exchangingchannel 611 blasts air to the compressor 2 to increase enthalpy,increasing a refrigerating capacity of the air conditioning system 1.

The expansion valve 12 serves as a flow adjustment component for thesecond heat exchanging channel 611 and adjusts the amount of the coolingmedium flowing in the second heat exchanging channel 611. Heat exchangemay be performed between the cooling medium flowing in the first heatexchanging channel 610 and the cooling medium flowing in the second heatexchanging channel 611 to sub-cool the cooling medium flowing in thefirst heat exchanging channel 610. Therefore, the heat exchanger 6 mayact as an economizer for the air conditioning system 1, increasing adegree of subcooling, further increasing a heat exchanging efficiency ofthe air conditioning system 1.

Further, in a heating mode, the connection port 31 of the four-way valve3 is connected to the connection port 33, and the connection port 32 ofthe four-way valve 3 is connected to the connection port 34. The coolingmedium output from air outputting port 21 of the compressor 2 flows fromthe indoor heat exchanger 5 to the outdoor heat exchanger 4 and takesthe indoor heat exchanger 5 as the condenser. In this case, the coolingmedium output from the indoor heat exchanger 5 is divided into twopaths. For one of the two paths, the cooling medium enters the firstheat exchanging channel 610 (the primary path). For the other one of thetwo paths, the cooling medium enters the second heat exchanging channel611 (the secondary path) via the expansion valve 12. The cooling mediumof the second heat exchanging channel 611 may sub-cool the coolingmedium of the first heat exchanging channel 610. The cooling medium thatflows through the second heat exchanging channel 611 supplies air forthe compressor 2 to increase enthalpy to improve a heating capacity ofthe air conditioner.

According to the present disclosure, the overall structure of the airconditioning system 1 as described above are optimized in the followingembodiments.

1. Micro-Channel Heat Exchanger

As shown in FIG. 2 , the heat exchanger 6 includes a heat exchangingbody 61. The heat exchanging body 61 defines micro-channels 612. Themicro-channels 612 include a first micro-channel and a secondmicro-channel. The first micro-channel serves as the first heatexchanging channel 610 of the heat exchanger 6, and the secondmicro-channel serves as the second heat exchanging channel 611 of theheat exchanger 6. Therefore, the first micro-channel 610 and the firstheat exchanging channel 610 are indicated by a same reference numeral,and the second micro-channel 611 and the second heat exchanging channel611 are indicated by a same reference numeral.

The heat exchanging body 61 may include a single plate body 613. Theplate body 613 defines micro-channels 612. The plurality ofmicro-channels 612 of the plate body 613 include first micro-channels610 and second micro-channels 611, and the first micro-channels 610 andthe second micro-channels 611 are arranged alternately. The firstmicro-channel 610 extends along an extension direction D1, the secondmicro-channel 610 extends along an extension direction D2, and theextension direction D1 is parallel to the extension direction D2. Forexample, the extension direction D1 of the first micro-channel 610 isthe same as the extension direction D2 of the second micro-channel 611.The plate body 613 may be a flat tube, and heat dissipation elements orelectronic elements may be arranged on the plate body 613. In someembodiments, the plate body 613 may be a carrier having a cross sectionin other shapes, such as having a cylinder cross section, a rectangularcross section, a square cross section, and so on. In some embodiments,as described in the following, the heat exchanging body 61 may includeat least two plate bodies or two tube bodies. The two plate bodies maybe laminated with each other. For the two tube bodies, one of the twotube bodies may sleeve the other tube bodies.

For each micro-channel 612, the micro-channel 612 may have a crosssection perpendicular to the extension direction of the micro-channel612, and the cross section may be rectangular. A side length of themicro-channel may be 0.5 mm-3 mm. For each micro-channel 612, a distancebetween the micro-channel 612 and a surface of the plate body 613 may be0.2 mm-0.5 mm, and a distance between two adjacent micro-channels 612may be 0.2 mm-0.5 mm, and the micro-channels 612 may meet requirementsof pressure resistance and heat exchanging performance. In someembodiments, the cross section of the micro-channel 612 may be in othershapes, such as circular, triangular, trapezoidal, oval or irregular.

For example, when the air conditioning system shown in FIG. 1 is in therefrigerating mode, the first cooling medium (i.e., the cooling mediumhaving the medium pressure and the medium temperature) flows through thefirst micro-channels 610, and the second cooling medium (i.e., thecooling medium having the low pressure and the low temperature) flowsthrough the second micro-channels 611. The first cooling medium may be aliquid phase medium, and the second cooling medium may be a medium intwo phases of liquid and gas. While the second cooling medium flowingalong the second micro-channels 611, the second cooling medium absorbsheat from the first cooling medium flowing in the first micro-channels610 to sub-cool the first cooling medium.

To be noted that, the heat exchanger having the micro-channels asdescribed in the above and in the following may not be limited to theapplication scenarios shown in FIG. 1 . Therefore, the terms “first” and“second” in the first micro-channel 610, the second micro-channel 611,the first cooling medium and the second cooling medium are used todistinguish different micro-channels and different cooling media only,and shall not be interpreted as limiting specific applications of themicro-channels and the cooling media. For example, in other embodimentsor other operating modes, the first cooling medium flowing through thefirst micro-channels 610 may absorb heat from the second cooling mediumflowing through the second micro-channels 611. Further, the firstcooling medium and the second cooling medium may not be limited as beingin the liquid phase or the liquid-gas phase as described in the above.

As shown in FIG. 1 , a flowing direction A1 of the first cooling mediumis opposite to a flowing direction A2 of the second cooling medium, andthere is a large temperature difference between a temperature of thefirst cooling medium and a temperature of the second cooling medium, andthe heat exchanging efficiency between the first cooling medium and thesecond cooling medium may be improved.

In some embodiments, the flowing direction A1 of the first coolingmedium may be the same as or perpendicular to the flowing direction A2of the second cooling medium.

In some embodiments, the heat exchanging body 61 may include at leasttwo sets of first micro-channels 610 and second micro-channels 611. Oneset of the at least two sets of first micro-channels 610 and secondmicro-channels 611 are spaced apart from another set of the at least twosets of first micro-channels 610 and second micro-channels 611 in thedirection perpendicular to the extension direction D1. As shown in FIG.2 , the direction perpendicular to the extension direction D1 may be awidth direction of the plate body 613. In some embodiments, thedirection perpendicular to the extension direction D1 may be a thicknessdirection of the plate body 613. For example, the first predeterminednumber of micro-channels may be selected from micro-channels 612 and maybe determined as the first micro-channels 610, and the secondpredetermined number of micro-channels may be selected frommicro-channels 612 and determined as the second micro-channels 611. Setsof the first micro-channels 610 and sets of the second micro-channels611 are arranged alternately. That is, a second micro-channel 611 isarranged between the two sets of the first micro-channels 610, and afirst micro-channel 610 is arranged between the two sets of the secondmicro-channels 611, and the at least two sets of the firstmicro-channels 610 are spaced apart from each other, and the at leasttwo sets of the second micro-channels 611 are spaced apart from eachother. In this way, the heat exchanger 6 having the first micro-channels610 and the second micro-channels 611 arranged alternately may beformed, as shown in FIG. 2 . The first predetermined number and thesecond predetermined number may be equal, such as 3. In someembodiments, the first predetermined number may be different from thesecond predetermined number, such as the first predetermined numberbeing 3, and the second predetermined number being 2.

In some embodiments, each of the first predetermined number and thesecond predetermined number may be 1. One of the micro-channels 612 isthe first micro-channel 610, and one micro-channel that is arrangedadjacent to the first micro-channel 610 may be the second micro-channel611.

For example, the heat exchanging body 61 may have 10*10 micro-channels612. An area of the cross section of the heat exchanging body 61 is thesame as an area of a conventional channel. An equal mass and an equalamount of the cooling medium may flow through each of the 10*10micro-channels 612 and the conventional channel. A characteristic lengthDh of each of the 10*10 micro-channels 612 is 1/10 of a characteristiclength of the conventional channel, and a pressure drop is proportionalto L/(Dh2). When the micro-channels and the conventional channel have asame pressure drop, a length L of the micro-channel 612 may be 1/100 ofa length of the conventional channel.

An effective heat exchanging area of the micro-channel 612 may be 1/10of an effective heat exchanging area of the conventional channel.According to a formula: a heat exchanging coefficient*the characteristiclength=a constant, the heat exchanging coefficient of the micro-channel612 may be 10 times of the heat exchanging coefficient of theconventional channel. According to the formula: the amount of exchangedheat=heat exchanging coefficient*a heat exchanging area, the amount ofexchanged heat of the micro-channel 612 may be equal to the amount ofexchanged heat of the conventional channel. Therefore, when the lengthof the 10*10 micro-channels 612 may be 1/100 of the length ofconventional channel, the micro-channels and the conventional channelmay satisfy a same heat loading requirement.

According to the above embodiments, the heat exchanging body 61 definesfirst micro-channels 610 and second micro-channels 611 to reduce alength of the heat exchanging body 61. A size of the heat exchanger 6may be reduced, and the amount of exchanged heat of the heat exchanger 6may be the same as the amount of exchanged heat of the economizer.

As shown in FIG. 3 , micro-channels 612 may be configured assingle-layered micro-channels or multi-layered micro-channels. In FIG. 3, an area of a cross section of the multi-layered micro-channels is fourtimes of an area of a cross section of the single-layered micro-channel,and a length of the single-layered micro-channels is four times of alength of the multi-layered micro-channels. When a mass and an amount ofthe cooling medium flows through the single-layered micro-channels isequal to a mass and an amount of the cooling medium flows through themulti-layered micro-channels, a flowing speed of the cooling medium inthe multi-layered micro-channels may be ¼ of a flowing speed of thecooling medium in the single-layered micro-channels.

When the cooling medium is in a laminar flowing state, a pressure dropof the multi-layered micro-channels may be 1/16 of a pressure drop ofthe single-layered micro-channels. Since the heat exchangingcoefficient*the characteristic length=the constant, when thecharacteristic length remains unchanged, when the heat exchangingcoefficient remains unchanged, and when a heat exchanging area of thesingle-layered micro-channels and a heat exchanging area of themulti-layered micro-channels remain unchanged, the amount of theexchanged heat of the single-layered micro-channels may be equal to theamount of the exchanged heat of the multi-layered micro-channels.Therefore, when the cooling medium is flowing at a low flowing speed andis in the laminar flowing state, the larger the area of the crosssection of micro-channels 612, the shorter the length of micro-channels612, and a flow resistance loss of the cooling medium may be reduced.

When the cooling medium is in a turbulent flowing state, the pressuredrop of the multi-layered micro-channel may be 1/48 of the pressure dropof the single-layered micro-channels. In this case, the heat exchangingcoefficient has a functional relationship with the flowing speed of thecooling medium. The higher the flowing speed of the cooling medium, thegreater the heat exchanging coefficient. Therefore, the amount of theexchanged heat of the single-layered micro-channels may be greater thanthe amount of the exchanged heat of the multi-layered micro-channels. Insummary, when the amount of the exchanged heat can be satisfied, thearea of the cross section of micro-channels 612 may be larger to reducethe flow resistance loss of the cooling medium.

1.1 Fluid-Collecting Tube Assembly

As shown in FIG. 4 , the heat exchanger 6 may further include afluid-collecting tube assembly 62. The fluid-collecting tube assembly 62and the heat exchanger body 61 may be arranged horizontally. Forexample, the fluid-collecting tube assembly 62 and the heat exchangerbody 61 may be arranged along a horizontal plane. In some embodiments,the fluid-collecting tube assembly 62 may be arranged vertically. Thatis, the fluid-collecting tube assembly 62 is arranged in a directionperpendicular to the horizontal plane (i.e., in a gravitationaldirection), and the heat exchanger body 61 is arranged horizontally. Insome embodiments, the fluid-collecting tube assembly 62 is arrangedvertically, and the heat exchanger body 61 is arranged vertically. Insome embodiments, the fluid-collecting tube assembly 62 is arrangedhorizontally, and the heat exchanger body 61 is arranged vertically.

The fluid-collecting tube assembly 62 may include a firstfluid-collecting tube 621 and a second fluid-collecting tube 622. Thefirst fluid-collecting tube 621 has a first fluid-collecting channel,and the second fluid-collecting tube 622 has a second fluid-collectingchannel. The heat exchanger 6 has a cross section along a direction thatthe cooling medium (the first cooling medium or the second coolingmedium) flows in the heat exchanging body 61, and the cross section is Ishaped. In some embodiments, the cross section may be L shaped, Ushaped, G shaped, circular, and so on.

The first fluid-collecting channel is communicated with the firstmicro-channel 610, and the first cooling medium may be provided to thefirst micro-channel 610 through the first fluid-collecting channel;and/or the first cooling medium that flows through the firstmicro-channel 610 may be collected. In the present embodiment, two firstfluid-collecting tubes 621 are arranged and are connected to two ends ofthe first micro-channel 610 respectively. In this way, the first coolingmedium may be provided to the first micro-channel 610 through the one ofthe two first fluid-collecting tubes 621, and the first cooling mediumthat flows through the first micro-channel 610 may be collected throughthe other one of the two first fluid-collecting tubes 621.

For example, in the air conditioning system shown in FIG. 1 , the firstend of the first micro-channel 610 is connected to the outdoor heatexchanger 4 through one of the two first fluid-collecting tubes 621 viathe expansion valve 13. In this way, in the refrigerating mode, thefirst cooling medium may be provided to the first micro-channel 610. Thesecond end of the first micro-channel 610 is connected to the indoorheat exchanger 5 through the other one of the two first fluid-collectingtubes 621, and the first cooling medium flowing through the firstmicro-channel 610 may be collected. In the heating mode, since the firstcooling medium may flow in the first micro-channel 610 in an oppositedirection, functions of the two first fluid-collecting tubes 621 may beinterchanged compared to the functions in the refrigerating mode.

The second fluid-collecting channel is communicated with the secondmicro-channel 611, and the second cooling medium may be provided to thesecond micro-channel 611 through the second fluid-collecting channel;and/or the second cooling medium that flows through the secondmicro-channel 611 may be collected. In the present embodiment, twosecond fluid-collecting tubes 622 are arranged and are connected to twoends of the second micro-channel 611 respectively. In this way, thesecond cooling medium may be provided to the second micro-channel 611through the one of the two second fluid-collecting tubes 622, and thesecond cooling medium that flows through the second micro-channel 611may be collected through the other one of the two secondfluid-collecting tubes 622.

For example, in the air conditioning system shown in FIG. 1 , the firstend of the second micro-channel 611 is connected to the expansion valve12 through one of the two second fluid-collecting tubes 622 to providethe second cooling medium to the second micro-channel 611. The secondend of the second micro-channel 611 is connected to the air intakingport 22 of the compressor 2 through the other one of the two secondfluid-collecting tubes 622 to collect the second cooling medium flowingthrough the second micro-channel 611.

In an embodiment, for the at least two sets of first micro-channels 610and second micro-channels 611, same ends of the first micro-channels 610are connected to one first fluid-collecting tube 621; and same ends ofthe second micro-channels 611 are connected to one secondfluid-collecting tube 622. That is, the same ends of all firstmicro-channels 610 of the heat exchanger 6 are connected to one firstfluid-collecting tube 621, and the same ends of all the secondmicro-channels 611 of the heat exchanger 6 are connected to one secondfluid-collecting tube 622. In this way, a corresponding fluid-collectingtube may not be arranged for each of the micro-channels, and costs maybe reduced.

According to the embodiment shown in FIG. 4 , since the extensiondirection D1 of the first micro-channel 610 is parallel to the extensiondirection D2 of the second micro-channel 611, an extension direction ofthe first fluid-collecting tube 621 is parallel to the extensiondirection of the second fluid-collecting tube 622. However, in someembodiments, the extension directions of the first fluid-collecting tube621 and the second fluid-collecting tube 622 may be adjusted based onthe extension directions of the first micro-channel 610 and the secondmicro-channel 611. For example, the extension direction of the firstfluid-collecting tube 621 may be perpendicular to the extensiondirection of the second fluid-collecting tube 622.

1.2 First Fluid-Collecting Tube being Spaced Apart from SecondFluid-Collecting Tube

As shown in FIG. 4 , the first fluid-collecting tube 621 is spaced apartfrom the second fluid-collecting tube 622 along the extension directionof the heat exchanging body 61. The extension direction of the heatexchanging body 61 is the same as the extension direction D1 of thefirst micro-channel 610 and the extension direction D2 of the secondmicro-channel 611. The second micro-channel 611 extends through thefirst fluid-collecting tube 621 and is connected to the secondfluid-collecting tube 622. The first fluid-collecting tube 621 isdisposed between the second fluid-collecting tube 622 and the heatexchanging body 61. The second micro-channel 611 extends through thefirst fluid-collecting tube 621 and is inserted into and welded with thesecond fluid-collecting tube 622. The first micro-channel 610 isinserted into and welded with the first fluid-collecting tube 621. Insome embodiments, the first micro-channel 610 may extend through thesecond fluid-collecting tube 622 and is further inserted into the firstfluid-collecting tube 621.

A distance between the first fluid-collecting tube 621 and the secondfluid-collecting tube 622 is R-2R. The R is a maximum cross-sectionaldimension of the first fluid-collecting tube 621 along a spacingdirection of the first fluid-collecting tube 621 and the secondfluid-collecting tube 622. Each of the cross section of the firstfluid-collecting tube 621 and the cross section of the secondfluid-collecting tube 622 may be circular. The R may be a diameter ofthe first fluid-collecting tube 621 or a diameter of the secondfluid-collecting tube 622. In some embodiments, the cross section of thefirst fluid-collecting tube 621 and the cross section of the secondfluid-collecting tube 622 may be in other shapes, such as oval, square,rectangular or irregular. When the cross section of the firstfluid-collecting tube 621 and the cross section of the secondfluid-collecting tube 622 are not circular, the R is a diameter of acircumcircle of the first fluid-collecting tube 621 or a diameter of acircumcircle of the second fluid-collecting tube 622.

Therefore, the distance between the first fluid-collecting tube 621 andthe second fluid-collecting tube 622 may be set to be large, and thefirst fluid-collecting tube 621 may be easily welded to the heatexchanging body 61, and the second fluid-collecting tube 622 may beeasily welded to the heat exchanging body 61. In addition, heat exchangeis not performed between the second micro-channel 611, which is disposedbetween the first fluid-collecting tube 621 and the secondfluid-collecting tube 622, and the first micro-channel 610. When thedistance between the first fluid-collecting tube 621 and the secondfluid-collecting tube 622 is small, the length of the secondmicro-channel 611 disposed between the first fluid-collecting tube 621and the second fluid-collecting tube 622 may be reduced, and the heatexchanging area of the second micro-channel 611 may be increased.

In some embodiments, the first fluid-collecting tube 621 and the secondfluid-collecting tube 622 may be welded to reduce the distance betweenthe first fluid-collecting tube 621 and the second fluid-collecting tube622.

In addition, the first micro-channel 610 may be connected to the firstfluid-collecting tube 621 by avoiding the second fluid-collecting tube622. For example, the first micro-channel 610 may be arranged at anoutside of the second fluid-collecting tube 622, and the firstmicro-channel 610 may be connected to the first fluid-collecting tube621 by avoiding the second fluid-collecting tube 622. In someembodiments, the second micro-channel 611 may be connected to the secondfluid-collecting tube 622 by avoiding the first fluid-collecting tube621.

1.3 Dividing Master Fluid-Collecting Tube into Two Fluid-CollectingTubes

As shown in FIG. 5 , the manifold fluid-collecting tube assembly 62includes a master fluid-collecting tube 623 and a flow divider 624. Theflow divider 624 is arranged inside the master fluid-collecting tube 623for dividing the master fluid-collecting tube 623 into the firstfluid-collecting tube 621 and the second fluid-collecting tube 622. Thatis, the master fluid-collecting tube 623 is configured as the firstfluid-collecting tube 621 and the second fluid-collecting tube 622separated by the flow divider 624. In this case, as shown in FIG. 5 ,the first micro-channel 610 extends through a side wall of the masterfluid-collecting tube 623 and is inserted into the firstfluid-collecting tube 621, and the second micro-channel 611 extendsthrough the side wall of the master fluid-collecting tube 623 and theflow divider 624 and is inserted into the second fluid-collecting tube622. In some embodiments, the second micro-channel 611 extends throughthe side wall of the master fluid-collecting tube 623 and is insertedinto the second fluid-collecting tube 622, and the first micro-channel610 extends through the side wall of the master fluid-collecting tube623 and the flow divider 624 and is inserted into the firstfluid-collecting tube 621. Compared to the fluid-collecting tubeassembly 62 shown in FIG. 4 , in the present embodiment, one masterfluid-collecting tube 623 is arranged to achieve functions of both thefirst fluid-collecting tube 621 and the second fluid-collecting tube622, and costs and a size of the fluid-collecting tube assembly 62 maybe reduced.

In some embodiments, the master fluid-collecting tube 623 is dividedinto two first fluid-collecting tubes 621 or two second fluid-collectingtubes 622 by the flow divider 624. In this case, an end of the firstmicro-channel 610 extends through the side wall of the masterfluid-collecting tube 623 and is inserted into one of the two firstfluid-collecting tubes 621, and the other end of the first micro-channel610 extends through the side wall of the master fluid-collecting tube623 and is inserted into the other one of the two first fluid-collectingtubes 621. One of the two first fluid-collecting tubes 621 is configuredto provide the first cooling medium to the first micro-channel 610, andthe other of the two first fluid-collecting tubes 621 is configured tocollect the first cooling medium flow through the first micro-channel610. In this case, the first micro-channel 610 may have a U-shapedflowing path.

In some embodiments, an end of the second micro-channel 611 extendsthrough the side wall of the master fluid-collecting tube 623 and isinserted into one of the two second fluid-collecting tubes 622, and theother end of the second micro-channel 611 extends through the side wallof the master fluid-collecting tube 623 and the flow divider 624 and isinserted into the other one of the two second fluid-collecting tubes622. One of the two second fluid-collecting tubes 622 is configured toprovide the second cooling medium to the second micro-channel 611, andthe other of the two second fluid-collecting tubes 622 is configured tocollect the second cooling medium flowing through the secondmicro-channel 611. In this case, the second micro-channel 611 may have aU-shaped flowing path.

1.4 First Fluid-Collecting Tube Sleeving or being Sleeved by SecondFluid-Collecting Tube

As shown in FIG. 6 , a diameter of the second fluid-collecting tube 622is smaller than a diameter of the first fluid-collecting tube 621. Thefirst fluid-collecting tube 621 sleeves an outside of the secondfluid-collecting tube 622. The first micro-channel 610 extends throughthe side wall of the first fluid-collecting tube 621 and is insertedinto the first fluid-collecting tube 621. The second micro-channel 611extends through the side wall of the first fluid-collecting tube 621 andthe side wall of the second fluid-collecting tube 622 and is insertedinto the second fluid-collecting tube 622. In some embodiments, thesecond fluid-collecting tube 622 may sleeve an outside of the firstfluid-collecting tube 621. In this case, the second micro-channel 611extends through the side wall of the second fluid-collecting tube 622and is inserted into the second fluid-collecting tube 622. The firstmicro-channel 610 extends through the side wall of the secondfluid-collecting tube 622 and the side wall of the firstfluid-collecting tube 621 and is inserted into the firstfluid-collecting tube 621.

Compared to the fluid-collecting tube assembly 62 shown in FIG. 4 , inthe present embodiment, the sleeving allows the size of thefluid-collecting tube assembly 62 to be reduced.

In some embodiments, the two first fluid-collecting tubes 621 may besleeved within each other, or the two second fluid-collecting tubes 622may be sleeved within each other. In this case, an end of the firstmicro-channel 610 extends through the side wall of an outer firstfluid-collecting tube 621 and is inserted into the outer firstfluid-collecting tube 621. The other end of the first micro-channel 610extends through the side wall inside the two first fluid-collectingtubes 621 and is inserted into an inner first fluid-collecting tube 621.The outer first fluid-collecting tube 621 is configured to provide thefirst cooling medium to the first micro-channel 610, and the inner firstfluid-collecting tube 621 is configured to collect the first coolingmedium flowing through the first micro-channel 610. In one embodiment,the inner first fluid-collecting tube 621 is configured to provide thefirst cooling medium to the first micro-channel 610, and the outer firstfluid-collecting tube 621 is configured to collect the first coolingmedium flowing through the first micro-channel 610. In this case, thefirst micro-channel 610 may have a U-shaped flowing path.

In one embodiment, an end of the second micro-channel 611 extendsthrough the side wall of an outer second fluid-collecting tube 622 andis inserted into the outer second fluid-collecting tube 622. The otherend of the second micro-channel 611 extends through the side wall insidethe two second fluid-collecting tubes 622 and is inserted into an innersecond fluid-collecting tube 622. The outer second fluid-collecting tube622 is configured to provide the second cooling medium to the secondmicro-channel 611, and the inner second fluid-collecting tube 622 isconfigured to collect the second cooling medium flowing through thesecond micro-channel 611. In one embodiment, the inner secondfluid-collecting tube 622 is configured to provide the second coolingmedium to the second micro-channel 611, and the outer secondfluid-collecting tube 622 is configured to collect the second coolingmedium flowing through the second micro-channel 611. In this case, thesecond micro-channel 611 may have a U-shaped flowing path.

2. Heat Exchanger Having Sleeved Tubes

As shown in FIG. 7 , the heat exchanger 6 includes the heat exchangingbody 61. The heat exchanging body includes a first tube body 614 and asecond tube body 615, and the first tube body 614 and the second tubebody 615 are sleeved within each other. The first tube body 614 definesfirst micro-channels 610, and the second tube body 615 defines secondmicro-channels 611. The first micro-channels 610 and secondmicro-channels 611 may be identical to the micro-channels 612 shown inFIG. 2 . Therefore, the length of the heat exchanging body 61 may bereduced, and the size of the heat exchanger 6 may be reduced.

The first micro-channels 610 of the first tube body 614 serve as firstheat exchanging channels 610 of the heat exchanger 6, and secondmicro-channels 611 of the second tube body 615 serve as second heatexchanging channels 611 of the heat exchanger 6. The extension directionof the first micro-channels 610 may be parallel to the extensiondirection of the second micro-channels 611. For example, the extensiondirection of the first micro-channels 610 is the same as the extensiondirection of the second micro-channels 611

In the present embodiment, the first tube body 614 sleeves an outside ofthe second tube body 615. An outer surface of the first tube body 614 isarranged with at least one flat surface 616 to form a heat exchangingcontact surface of the first tube body 614, as shown in FIG. 8 . Heatdissipation elements or electronic elements may be arranged on the flatsurface 616 for being easily arranged. In some embodiments, the secondtube body 615 may sleeve an outer side of the first tube body 614.

In the air conditioning system in FIG. 1 , the first cooling mediumflows through first micro-channels 610, and the second cooling mediumflows through second micro-channels 611. The first cooling medium may bein the liquid phase, and the second cooling medium may be in thegas-liquid phase. While the second cooling medium is flowing alongsecond micro-channels 611, the second cooling medium absorbs heat fromthe first cooling medium in first micro-channels 610 and may be gasifiedto further sub-cool the first cooling medium. In some embodiments, thefirst cooling medium and the second cooling medium may be configured inother manners as described in the above.

Compared to the heat exchanger 6 in FIG. 2 , in the present embodiment,the area of the cross section of the heat exchanging body 61 isincreased, and a pressure loss of the cooling medium may be reduced. Inaddition, the first tube body 614 sleeves the outside of the second tubebody 615, the heat exchanging area of first micro-channels 610 andsecond micro-channels 611 may be increased, and the heat exchangingefficiency between the first heat exchanging channel 610 and the secondheat exchanging channel 611 may be improved.

As shown in FIG. 4 , the heat exchanger 6 may further include thefluid-collecting tube assembly 62. The fluid-collecting tube assembly 62may include a first fluid-collecting tube 621 and a secondfluid-collecting tube 622. The first fluid-collecting tube 621 has afirst fluid-collecting channel, and the second fluid-collecting tube 622has a second fluid-collecting channel. The cross section of the heatexchanger 6 may be I shaped. For example, the heat exchanger 6 has thecross section along the direction that the cooling medium flows in theheat exchanging body 61, and the cross section may be I shaped. In someembodiments, the cross section may be L shaped, U shaped, G shaped,circular, and so on.

The first fluid-collecting channel is communicated with the firstmicro-channel 610, and the first cooling medium may be provided to firstmicro-channels 610 through the first fluid-collecting channel; and/orthe first cooling medium that flows through first micro-channels 610 maybe collected. Two first fluid-collecting tubes 621 are arranged and areconnected to two ends of the first tube body 614, respectively. In thisway, the first cooling medium may be provided to first micro-channels610 through one of the two first fluid-collecting tubes 621, and thefirst cooling medium that flows through first micro-channels 610 may becollected through the other one of the two first fluid-collecting tubes621.

The second fluid-collecting channel is communicated with the secondmicro-channel 611, and the second cooling medium may be provided tosecond micro-channels 611 through the second fluid-collecting channel;and/or the second cooling medium that flows through secondmicro-channels 611 may be collected. Two second fluid-collecting tubes622 are arranged and are connected to two ends of the second tube body615 respectively. In this way, the second cooling medium may be providedto second micro-channels 611 through one of the two secondfluid-collecting tubes 622, and the second cooling medium that flowsthrough second micro-channels 611 may be collected through the other oneof the two second fluid-collecting tubes 622.

In some embodiments, the heat exchanging body 61 may include at leasttwo sets of first tube bodies 614 and second tube bodies 615. One of theat least two sets of first tube bodies 614 and second tube bodies 615may be spaced apart from another one of the at least two sets of firsttube bodies 614 and second tube bodies 615 in a direction perpendicularto the extension direction. For example, the at least two sets of firsttube bodies 614 and the second tube bodies 615 may include a first setof first tube bodies 614 and the second tube bodies 615 and a second setof first tube bodies 614 and the second tube bodies 615. For the firstset, the first tube bodies 614 and the second tube bodies 615 may besleeved within each other. For the second set, the first tube bodies 614and the second tube bodies 615 may be sleeved within each other. Thefirst set of first tube bodies 614 and the second tube bodies 615 may bespaced apart from the second set of first tube bodies 614 and the secondtube bodies 615, in the direction perpendicular to the extensiondirection.

For the at least two sets of first tube bodies 614 and second tubebodies 615, same ends of the first tube bodies 614 are connected to onefirst fluid-collecting tube 621, and same ends of the second tube bodies615 are connected to one second fluid-collecting tube 622, and costs maybe reduced.

The fluid-collecting tubes of the fluid-collecting tube assembly 62 maybe configured in any one of the above-described manners. For example, asdescribed in the above, the first fluid-collecting tube 621 is spacedapart from the second fluid-collecting tube 622, the flow divider 624 isarranged inside the master fluid-collecting tube 623, or the firstfluid-collecting tube 621 and second fluid-collecting tube 622 aresleeved within each other. In this case, the first tube body 614, thefirst micro-channel 610 arranged with the first tube body 614, thesecond tube body 615, and the second micro-channel 611 arranged withsecond tube body 615 may be engaged with the fluid-collecting tube inthe above-mentioned manners, which will not be repeatedly describedherein.

3. Heat Exchanger Having First Plate Body and Second Plate Body that areLaminated with Each Other

As shown in FIG. 9 , the heat exchanger 6 includes a heat exchangingbody 61. The heat exchanging body 61 includes a first plate body 631 anda second plate body 632, the first plate body 631 and the second platebody 632 are laminated with each other.

The first plate body 631 defines first micro-channels 610, and thesecond plate body 632 defines second micro-channels 611. The firstmicro-channels 610 and second micro-channels 611 may be identical to themicro-channels 612 shown in FIG. 2 and will not be repeated here.Therefore, the length of the heat exchanging body 61 may be reduced, andthe size of the heat exchanger 6 may be reduced.

The first micro-channels 610 of the first plate body 631 serve as thefirst heat exchanging channels 610 of the heat exchanger 6, and secondmicro-channels 611 of the second plate body 632 serve as the second heatexchanging channels 611 of the heat exchanger 6. The extension directionof the first micro-channels 610 is parallel to the extension directionof the second micro-channels 611. For example, the extension directionof the first micro-channels 610 is the same as the extension directionof the second micro-channels 611. Since the first plate body 631 and thesecond plate body 632 are laminated with each other, a contact areabetween the first plate body 631 and the second plate body 632 isincreased to increase the heat exchanging area between the first heatexchanging channel 610 and the second heat exchanging channel 611, andthe heat exchanging efficiency may be improved.

In the air conditioning system in FIG. 1 , the first cooling mediumflows through first micro-channels 610, and the second cooling mediumflows through second micro-channels 611. The first cooling medium may bein the liquid phase, and the second cooling medium may be in thegas-liquid phase. While the second cooling medium is flowing alongsecond micro-channels 611, the second cooling medium absorbs heat fromthe first cooling medium in first micro-channels 610 and may be gasifiedto further sub-cool the first cooling medium. In some embodiments, thefirst cooling medium and the second cooling medium may be configured inother manners as described in the above.

In some embodiments, two first plate bodies 631 may be arranged, and thesecond plate body 632 may be clamped between the two first plate bodies631. For example, the first plate body 631, the second plate body 632and the first plate body 631 are arranged sequentially and arelaminated. Since the second plate body 632 is clamped between the twofirst plate bodies 631, the second cooling medium of the second platebody 632 simultaneously absorbs heat from the first cooling media of thetwo first plate bodies 631, and the first cooling media of the two firstplate bodies 631 may be sub-cooled. In addition, the heat dissipationelements or electronic elements may be arranged to be thermallyconnected to the first plate body 631. For example, the heat dissipationelements or electronic elements may be arranged on a surface of thefirst plate body 631 away from the second plate body 632 to facilitatearrangement. In an embodiment, the two first plate bodies 631 may be twoseparated plates that are independent from each other. In someembodiments, the two first plate bodies 631 may be connected with eachother to form an integral one-piece structure, in a U-shape. In thiscase, the first micro-channels 610 in the two first plate bodies 631 arecommunicated with each other in the U-shaped structure, and an inlet andan outlet of the first micro-channels 610 are located on a same side ofthe heat exchanging body 61.

In some embodiments, two second plate bodies 632 may be arranged. Thefirst plate body 631 may be clamped between the two second plate bodies632. In this case, the heat dissipation elements or the electronicelements may be arranged to be thermally connected to the second platebody 632.

As shown in FIG. 10 , the heat exchanger 6 may further include thefluid-collecting tube assembly 62. The fluid-collecting tube assembly 62may include a first fluid-collecting tube 621 and a secondfluid-collecting tube 622. The first fluid-collecting tube 621 has afirst fluid-collecting channel, and the second fluid-collecting tube 622has a second fluid-collecting channel. The heat exchanger 6 has thecross section along the direction that the cooling medium flows in theheat exchanging body 61, and the cross section may be I shaped. In someembodiments, the cross section may be L shaped, U shaped, G shaped,circular, and so on.

The first fluid-collecting channel is communicated with the firstmicro-channel 610, and the first cooling medium may be provided to firstmicro-channels 610 through the first fluid-collecting channel; and/orthe first cooling medium that flows through first micro-channels 610 maybe collected. Two first fluid-collecting tubes 621 are arranged and areconnected to two ends of the first plate body 631, respectively. In thisway, the first cooling medium may be provided to first micro-channels610 through one of the two first fluid-collecting tubes 621, and thefirst cooling medium that flows through first micro-channels 610 may becollected through the other one of the two first fluid-collecting tubes621.

The second fluid-collecting channel is communicated with the secondmicro-channel 611, and the second cooling medium may be provided tosecond micro-channels 611 through the second fluid-collecting channel;and/or the second cooling medium that flows through secondmicro-channels 611 may be collected. Two second fluid-collecting tubes622 are arranged and are connected to two ends of the second plate body632 respectively. In this way, the second cooling medium may be providedto second micro-channels 611 through one of the two secondfluid-collecting tubes 622, and the second cooling medium that flowsthrough second micro-channels 611 may be collected through the other oneof the two second fluid-collecting tubes 622.

In some embodiments, the heat exchanging body 61 may include at leasttwo sets of first plate bodies 631 and second plate bodies 632. One setof the at least two sets of first plate bodies 631 and second platebodies 632 may be spaced apart from another set of the at least two setsof first plate bodies 631 and second plate bodies 632 in a directionperpendicular to the extension direction. For example, as shown in FIG.10 , the heat exchanging body 61 includes three sets of first platebodies 631 and the second plate bodies 632. The three sets may be spacedapart from each other along the extension direction of the firstmicro-channel 610 or along the direction perpendicular to the extensiondirection of the second micro-channel 611.

For the at least two sets of first plate bodies 631 and second platebodies 632, same ends of the first plate bodies 631 are connected to onefirst fluid-collecting tube 621, and same ends of the second platebodies 632 are connected to one second fluid-collecting tube 622. Forexample, same ends of all first plate bodies 631 of the heat exchangingbody 61 are connected to one first fluid-collecting tube 621, and costsmay be reduced.

In the present embodiment, the first fluid-collecting tube 621 is spacedapart from the second fluid-collecting tube 622. The second plate body632 extends through the first fluid-collecting tube 621 and is insertedinto the second fluid-collecting tube 622. The first fluid-collectingtube 621 is disposed between the second fluid-collecting tube 622 andthe heat exchanging body 61. The second plate body 632 extends throughthe first fluid-collecting tube 621 and is inserted into and welded withthe second fluid-collecting tube 622. The first plate body 631 isinserted into and welded with the first fluid-collecting tube 621. Insome embodiments, the first plate body 631 extends through the secondfluid-collecting tube 622 to further connect to the firstfluid-collecting tube 621.

A distance between the first fluid-collecting tube 621 and the secondfluid-collecting tube 622 is R-2R. The R is a maximum cross-sectionaldimension of the first fluid-collecting tube 621 along a spacingdirection of the first fluid-collecting tube 621 and the secondfluid-collecting tube 622. Each of the cross section of the firstfluid-collecting tube 621 and the cross section of the secondfluid-collecting tube 622 may be circular. The R may be a diameter ofthe first fluid-collecting tube 621 or a diameter of the secondfluid-collecting tube 622. Further, as described in the above, when thecross section of the first fluid-collecting tube 621 and the crosssection of the second fluid-collecting tube 622 are not circular, the Ris the diameter of the circumcircle of the first fluid-collecting tube621 or the diameter of the circumcircle of the second fluid-collectingtube 622.

The fluid-collecting tubes of the fluid-collecting tube assembly 62 maybe configured in any one of the above-described manners. For example, asdescribed in the above, the flow divider 624 is arranged inside themaster fluid-collecting tube 623, or the first fluid-collecting tube 621and second fluid-collecting tube 622 are sleeved within each other. Inthis case, the first plate body 631, the first micro-channel 610arranged with the first plate body 631, the second plate body 633, andthe second micro-channel 611 arranged with second plate body 632 may beengaged with the fluid-collecting tube in the above-mentioned manners,which will not be repeatedly described herein.

4. Heat Exchanger Serving as Heat Dissipation Member

In the present disclosure, the heat exchanger 6 described above mayserve as a heat dissipation member (hereinafter described as the heatdissipation member 6). The heat dissipation member 6 includes a heatexchanging body 61 and a fluid-collecting tube assembly 62. The heatdissipation member 6 is arranged on an electric control box 7 todissipate heat from the electric control box 7 and electronic components71 arranged inside the electric control box 7. To be noted that, theheat dissipation member 6 referred herein shall include the variousforms of heat exchangers as described in the above, and shall not belimited to one particular embodiment.

As shown in FIG. 11 , the electric control box 7 may include a box body72 and the electronic element 71. The box body 72 defines a mountingcavity 721, and the electronic element 71 is received in the mountingcavity 721. The box body 72 is made of metal plate. The electronicelement 71 in the mounting cavity 721 may be a compressor, a fan, acapacitor, an electric control and a common mode inductor.

As shown in FIG. 11 , the box body 72 includes a top plate (not shown inthe drawings, arranged opposite to a bottom plate 723 to cover anopening of the mounting cavity 721), a bottom plate 723, and acircumferential side plate 724. The top plate and the bottom plate 723are opposite to each other. The circumferential side plate 724 isconnected to the top plate and the bottom plate 723, and the mountingcavity 721 is defined.

In detail, as shown in FIG. 11 , the bottom plate 723 and the top plateare rectangular. Four circumferential side plates 724 may be arranged.Each of the four circumferential side plates 724 are connected to acorresponding side of the bottom plate 723 and a corresponding side ofthe top plate, and the four circumferential side plates 724, the bottomplate 723 and the top plate cooperatively form the rectangular electriccontrol box 7. A length of a long side of the bottom plate 723 is alength of the electric control box 7, and a length of a short side ofthe bottom plate 723 is a width of the electric control box 7. A heightof the circumferential side plate 724 perpendicular to the bottom plate723 is a height of the electric control box 7. As shown in FIG. 11 , thelength of the electric control box 7 in an X direction is the length ofthe electric control box 7, the length of the electric control box 7 ina Y direction is the height of the electric control box 7, and thelength of the electric control box 7 in a Z direction is the width ofthe electric control box 7.

In some embodiments, a shape of the bottom plate 723 and a shape of thetop plate of the box body 72 may be circular, trapezoidal, triangular,and so on. The circumferential side plates 724 are arranged around anouter circumference of the bottom plate 723 to form any shape of theelectric control box 7. The shape of the electric control box 7 may bedetermined based on the demands, and will not be limited by the presentdisclosure.

Detailed engagement between the heat dissipation member 6 and theelectric control box 7 will be described in the following embodiments.

5. Heat Exchanging Body being L Shaped and U Shaped

Usually, the heat exchanging body 61 is straight, as shown in FIG. 10 ,the heat exchanging body 61 has an overall length, an overall width andan overall height. The overall length is the length of the heatexchanging body 61 in the extension direction, i.e., the length of theheat exchanging body 61 along the X direction shown in FIG. 10 . Theoverall width is the length of the heat exchanging body 61 in adirection perpendicular to the extension direction and perpendicular toa plane where the heat exchanging body 61 is disposed, i.e., the lengthof the heat exchanging body 61 along the Y direction shown in FIG. 10 .The overall height is the length of the heat exchanging body 61 in the Zdirection shown in FIG. 10 .

The plane where the heat exchanging body 61 is disposed refers to aplane and the fluid-collecting tube assembly 62 is disposed, i.e., theplane XOZ shown in FIG. 10 .

In order to ensure the heat exchanging effect of the heat dissipationmember 6, when a size of the cross section of the heat dissipationmember 6 remains unchanged, the extension length of the heat exchangingbody 61 needs to be increased to increase the heat exchanging area, andthe heat exchanging effect may be improved. When the heat exchangingbody 61 is configured as a straight strip, the overall length of theheat exchanging body 61 may be large, a size of the electric control box7, which is engaged with the heat dissipation member 6, may be large,and the electric control box 7 may not be configured to be miniaturized.

Therefore, as shown in FIG. 11 and FIG. 12 , in order to reduce theoverall length of the heat exchanging body 61, the heat exchanging body61 may be configured as including a first extension portion 617 and asecond extension portion 618. The second extension portion 618 isconnected to an end of the first extension portion 617 and is benttowards a side of the first extension portion 617.

In the present embodiment, the heat exchanging body 61 is bent, and thefirst extension portion 617 is connected to and bent towards the secondextension portion 618. In this way, the heat exchanging body 61 has asufficient extension length, but the overall length of the heatexchanging body 61 may be reduced. Therefore, the length of the electriccontrol box 7, which is engaged with the heat dissipation member 6, inthe X direction may be reduced, and the size of the electric control box7 may be reduced.

In the present embodiment, as shown in FIG. 11 and FIG. 12 , the heatexchanging body 61 may be arranged on the bottom plate 723 of theelectric control box 7.

In detail, the first extension portion 617 may be parallel to the bottomplate 723, and the length of the bottom plate 723 in the lengthdirection may be fully applied to allow the length of the heatexchanging body 61 to be maximized, improving the heat exchangingeffect. The second extension portion 618 may be parallel to thecircumferential side plate 724 in order to reduce a space occupied bythe second extension portion 618 in the X direction.

In some embodiments, the first extension portion 617 may abut against ormay be spaced apart from the bottom plate 723. The second extensionportion 618 may abut against or may be spaced apart from thecircumferential side plate 724. The present disclosure does not limitthe relative positions between the extension portions and the plates.

In some embodiments, the heat exchanging body 61 may be arranged on thecircumferential side plate 724 of the electric control box 7. In detail,the first extension portion 617 may be parallel to one of the fourcircumferential side plates 724, and the second extension portion 618may be parallel to another one of the four circumferential side plates724, and the another one of the four circumferential side plates 724 maybe adjacent to the one circumferential side plate 724 parallel to thefirst extension portion 617. In this way, the heat dissipation member 6may be arranged on one side of the mounting cavity 721.

In some embodiments, the heat exchanging body 61 may be fixed at otherpositions of the electric control box 7 based on the arrangement of theelectronic elements 71, and so on. The present disclosure does not limita position where the heat exchanging body 61 shall be arranged.

Further, as shown in FIG. 12 , more than one second extension portions618 may be arranged. One of the more than one second extension portions618 may be connected to one of two ends of the first extension portion617, and the heat exchanging body 61 may be L-shaped.

As shown in FIG. 12 , two second extension portions 618 may be arranged.The two second extension portions 618 may be connected to two ends ofthe first extension portion 617, respectively, and may be bent towards asame side of the first extension portion 617.

In detail, the two second extension portions 618 may be parallel to eachother and may be spaced apart from each other, and the two secondextension portions 618 may be arranged at opposite ends of the firstextension portion 617, and the overall length of the heat exchangingbody 61 may be reduced but the heat exchanging effect of the heatexchanging body 61 may be maintained, and a size of the heat dissipationmember 6 may be reduced. In addition, by contrast to arranging the twosecond extension portion 618 on opposite sides of the first extensionportion 617, in the present embodiment, the two second extensionportions 618 may be bent and arranged on a same side of the firstextension portion 617, and the overall width of the heat dissipationmember 6 may be reduced.

Further, the two second extension portions 618 may be perpendicular tothe first extension portion 617 to form a U-shaped heat exchanging body61. In this way, the overall length of the heat exchanging body 61 maybe reduced, and a space occupied by the second extension portions 618 inthe X direction may be reduced, and the two second extension portions618 may not interfere with the electronic elements 71 arranged insidethe mounting cavity 721.

In some embodiments, the two second extension portions 618 may beinclined relative to the first extension portion 617, an angle that oneof the two second extension portions 618 is inclined relative to thefirst extension portion 617 may be different from another angle that theother one of the two second extension portions 618 is inclined relativeto the first extension portion 617. In this way, the overall width ofthe electric control box 7 may be reduced.

Further, an extension length of the first extension portion 617 may begreater than an extension length of the second extension 618, and thefirst extension portion 617 may be arranged along the length of theelectric control box 7, and the second extension portion 618 may bearranged along the width or the height of the electric control box 7.

Further, as shown in FIG. 11 , one heat dissipation member 6 may bereceived in the mounting cavity 721. The one heat dissipation member 6may be received in the mounting cavity 721 extending along the length ofthe box body 72. In some embodiments, the one heat dissipation member 6may be received in the mounting cavity 721 extending along the height ofthe box body 72.

In some embodiments, at least two heat dissipation members 6 may bereceived in the mounting cavity 721. For example, the number of heatdissipation members 6 may be two, three, four, five, and so on. Byarranging a larger number of heat dissipation members 6, the heatdissipation effect of the electric control box 7 may be improved.

In detail, two heat dissipation members 6 may be received in themounting cavity 721. Two heat exchanging bodies 61 of the two heatdissipation members 6 may be L-shaped. The two heat dissipation members6 may be spaced apart from each other along the length direction (Xdirection) of the electric control box 7. That is, the first extensionportion 617 of one of the two heat dissipation members 6 may be spacedapart from the first extension portion 617 of the other one of the twoheat dissipation members 6, along the length direction (X direction) ofthe electric control box 7. For one of the two heat dissipation members6, the second extension portions 618 may be disposed on a side of thefirst extension portion 617 away from the first extension portion 617 ofthe other one of the two heat dissipation members 6. In this way, thetwo heat dissipation members 6 may not interfere with the electronicelements 71 received in the mounting cavity 721.

In some embodiments, the two heat dissipation members 6 may be arrangedside by side and spaced apart from each other along the width direction(Z direction) of the electric control box 7. That is, the firstextension portion 617 of each of the two heat dissipation members 6extends along the length direction (X direction) of the electric controlbox 7, and the first extension portion 617 of one of the two heatdissipation members 6 and the first extension portion 617 of the otherone of the two heat dissipation members 6 may be arranged side by sideand may be spaced apart from each other. For each of the two heatdissipation members 6, the second extension portions 618 may be disposedon a same side or on different sides of the corresponding firstextension portion 617.

5.1 Fixing Bracket

In the art, since the economizer arranged inside the electric controlbox 7 may be large in size and may have an irregular shape, a fixingstructure of the economizer may be complicated and may not be assembledefficiently. In the present disclosure, the heat dissipation member 6may be plate shaped, and the heat dissipation member 6 may be assembledand fixed easily, improving the assembling efficiency.

In the present embodiment, as shown in FIG. 14 , the electric controlbox 7 may include a fixing bracket 73, and the fixing bracket 73 may beconnected between the heat exchanging body 61 and the box body 72 toenable the heat exchanging body 61 to be fixedly arranged inside theelectric control box 7.

In the present embodiments, the fixing bracket 73 may be connectedbetween the first extension portion 617 and the circumferential sideplate 724. In one embodiment, the fixing bracket 73 may be connectedbetween the second extension portion 618 and the circumferential sideplate 724. Connection structures of the above two arrangements maysubstantially be the same. In the following, the fixing bracket 73 beingconnected between the first extension portion 617 and thecircumferential side plate 724 may be taken as an example to illustratethe connection structure of the heat exchanging body 61 and the box body72.

As shown in FIG. 14 , the fixing bracket 73 may include a first fixingportion 731 and a second fixing p portion art 732. The first fixingportion 731 may bend towards the second fixing p portion art 732. Thefirst fixing portion 731 may be welded to the first extension portion617, and the second fixing portion 732 may be fastened to thecircumferential side plate 724.

In detail, the first fixing portion 731 may be welded to one of mainsurfaces of the heat exchanging body 61 to increase a welding areabetween the fixing bracket 73 and the heat exchanging body 61, improvinga welding strength. By welding the first fixing portion 731 to the firstextension portion 617, the first extension portion 617 may not need todefine any hole, and the micro-channels defined in the heat exchangingbody 61 may not be interrupted. The second fixing portion 732 may beconnected to the circumferential side plate 724 by screws, snaps orglue, and the heat dissipation member 6 may be maintained or replacedeasily.

The main surface of the heat exchanging body 61 refers to a surface ofthe heat exchanging body 61 having a large area. In this embodiment, asshown in FIG. 10 , the main surface of the heat exchanging body 61refers to a surface parallel to the XOZ plane.

In some embodiments, as shown in FIG. 14 , the second fixing portion 732is connected vertically to the first fixing portion 731, and an L-shapedfixing bracket 73 may be formed. By connecting the first fixing portion731 vertically to the second fixing portion 732, forces applied to thefixing bracket 73 may be evenly distributed on the fixing bracket 73.

In one embodiment, as shown in FIG. 15 , the fixing bracket 73 mayinclude a first fixed portion 731, a second fixed portion 732 and athird fixed portion 733. The first fixed portion 731, a second fixedportion 732 and a third fixed portion 733 may be connected with eachother, and a connection part between any two of the portions may bebent. The first fixed portion 731 and the third fixed portion 733 may bespaced apart from each other and connected to the bottom plate 723. Thesecond fixed portion 732 and the bottom plate 723 may be spaced apartfrom each other to cooperatively define a clamping slot 734. The firstextension portion 617 may be welded to a side of the second fixedportion 732 away from the clamping slot 734. In this case, the heatexchanging body 61 may be spaced apart from the bottom plate 723, andthe contact between the heat exchanging body 61 and the electric controlbox 7 may be interrupted, heat exchanging between the heat exchangingbody 61 and the electric control box 7 may be avoided, and the heatdissipation efficiency of the heat dissipation member 6 may not bereduced.

In detail, the first fixed portion 731 and the third fixed portion 733may be bent towards and connected to opposite ends of the second fixedportion 732 and may be disposed on a same side of the second fixedportion 732, and a clamping slot 734 in a C shape may be defined. An endof the first fixed portion 731 away from the second fixed portion 732and an end of the third fixed portion 733 away from the second fixedportion 732 may be connected to the bottom plate 723. The connectionmanner between the second fixing portion 732 and the heat exchangingbody 61 may be the same as and may be referred to the embodimentsdescribed in the above. The connection manner that the first fixingportion 731 and the third fixing portion 733 are connected to the bottomplate 723 may be the same as and may be referred to the embodimentsdescribed in the above. The connection manners will not be repeatedherein.

In some embodiments, the first extension portion 617 may be clamped inthe clamping slot 734. The first extension portion 617 may abut againstthe bottom plate 723 and the second fixing portion 732 on two oppositesides along the overall width direction of the heat exchanging body 61.The first extension portion 617 may abut against the first fixingportion 731 and the third fixing portion 733 on two opposite sides alongthe overall height direction of the heat exchanging body 61. In thisway, the first extension portion 617 may be fixed. The heat exchangingbody 61 may be fixed by being clamped, and the heat exchanging body 61may not be damaged, and the heat exchanging body 61 may be easilyrepaired or replaced.

The above-mentioned fixing brackets may be applied to fix the heatdissipation members in any forms as disclosed herein, and a position andthe heat dissipation member is fixed may not be limited herein.

5.2 Heat Dissipation Member Arranged Inside Electric Control Box

Further as shown in FIG. 11 , the heat dissipation member 6 is receivedin the mounting cavity 721 of the electric control box 7. In detail, theheat dissipation member 6 may be thermal-conductively connected to theelectronic element 71 received in the mounting cavity 721 to dissipateheat from the electronic element 71.

In detail, as described in the embodiments of FIG. 11 , the electronicelement 71 may be thermal-conductively connected to the first extensionportion 617 and/or the second extension portion 618. The heatdissipation members in any forms as disclosed herein may be receivedinside the mounting cavity 721 of the electric control box 7 or appliedto dissipate heat from the electric control box 7, and may be directlyor indirectly thermal-conductively connected to the electronic element71.

When the heat dissipation member 6 is received in the mounting cavity721, in the embodiment shown in FIG. 11 , the electronic element 71 maybe thermal-conductively connected to the first extension portion 617.The electronic element 71 and the second extension portion 618 may bearranged on a same side of the first extension portion 617, and theheight of the electric control box 7, i.e., a size along the Ydirection, may be reduced.

In some embodiments, the electronic element 71 may bethermal-conductively connected to the second extension portion 618, andmay be arranged on a side of the second extension portion 618 facingtowards the first extension portion 617, and the length of the electriccontrol box 7, i.e., a size along the X direction, may be reduced.

In some embodiments, a part of the electronic element 71 may be arrangedon the first extension portion 617, and another part of the electronicelement 71 may be arranged on the second extension portion 618, and theelectronic element 71 may be evenly distributed.

Since the number of electronic elements 71 may be large, connecting eachof the large number of the electronic elements 71 to the heat exchangingbody 61 may cause the electronic elements 71 to be mounted in acomplicated manner, and the mounting efficiency may be low.

Therefore, as shown in FIG. 11 and FIG. 16 , a heat dissipation fixingplate 74 may be arranged inside the electric control box 7. Theelectronic elements 71 may be arranged on the heat dissipation fixingplate 74. Further, the heat dissipation fixing plate 74 may be arrangedon the heat exchanging body 61, and the electronic elements 71 may bethermal-conductively connected to the heat exchanging body 61 throughthe heat dissipation fixing plate 74. In this way, the efficiency ofmounting the electronic elements 71 may be greatly improved.

In detail, the heat dissipation fixing plate 74 may be arranged on thefirst extension portion 617 and/or the second extension portion 618, andthe electronic elements 71 may be arranged on a side of the heatdissipation fixing plate 74 away from the first extension portion 617and/or the second extension portion 618.

Further, the heat dissipation fixing plate 74 may be arranged on themain surface of the heat exchanging body 61 to increase the contact areabetween the heat dissipation fixing plate 74 and the heat exchangingbody 61, and the heat exchanging efficiency may be improved. In oneembodiment, the main surface of the heat exchanging body 61 may providea larger support surface for the heat dissipation fixing plate 74, andtherefore, the electronic elements 71 may be arranged more stably.

The heat dissipation fixing plate 74 may be made of metal or alloyhaving better thermal conductivity. For example, the heat dissipationfixing plate 74 may be made of aluminum, copper, aluminum alloy, and soon, to enhance the efficiency of heat conductivity.

In some embodiments, as shown in FIG. 17 , the heat pipe 741 may beembedded in the heat dissipation fixing plate 74. The heat pipe 741 maybe configured to rapidly conduct heat from a concentrated high-densityheat source to the entire surface of the heat dissipation fixing plate74, and the heat may be evenly distributed on the heat dissipationfixing plate 74, and the heat exchanging effect between the heatdissipation fixing plate 74 and the heat exchanging body 61 may beenhanced.

As shown in the upper portion of FIG. 17 , the heat pipe 741 may belong-strip shaped. Heat pipes 741 may be arranged. The heat pipes 741may be arranged in parallel and spaced apart from each other. In oneembodiment, as shown in the lower portion of FIG. 17 , heat pipes 741may be connected successively to each other to form a square or a frame,which will not be limited by the present application.

5.3 Heat Dissipation Member Arranged Out of Electric Control Box

As shown in FIG. 18 , the heat dissipation member 6 may be arranged onan outside of the electric control box 7. The box body 72 of theelectric control box 7 may define an assembly port 726, and theelectronic elements 71 may be thermal-conductively connected to the heatdissipation member 6 through the assembly port 726.

In detail, as shown in FIG. 18 , the heat dissipation fixing plate 74may be connected to the heat dissipation member 6 and cover the assemblyport 726. The electronic elements 71 may be arranged on a surface of theheat dissipation fixing plate 74 away from the heat dissipation member6.

In some embodiments, as shown in FIG. 19 , the heat pipe 741 may bearranged to enable the electronic elements 71 to be thermal-conductivelyconnected to the heat dissipation member 6. For example, the heat pipe741 may include a heat absorbing end 741 a and a heat releasing end 741b. The heat absorbing end 741 a of the heat pipe 741 may be insertedinside the mounting cavity 721 and thermal-conductively connected to theelectronic elements 71 to absorb heat from the electronic elements 71.The heat releasing end 741 b of the heat pipe 741 may be arranged on theoutside of the electric control box 7 and thermal-conductively connectedto the heat dissipation member 6, taking the heat dissipation member 6to dissipate heat from the heat releasing end 741 b of the heat pipe741.

5.4 Heat Dissipation Fin

A large amount of heat may be generated while the electronic elements 71are operating, and the electric control box 7 may be relatively sealed.When the heat in the electric control box 7 cannot be released in time,a temperature in the mounting cavity 721 of the electric control box 7may be high. Therefore, the electronic elements 71 may be damaged.Although the cooling medium flowing in the heat dissipation member 6arranged inside the mounting cavity 721 may take away some of the heat,the heat dissipation performance of the electric control box 7 may stillbe poor.

Therefore, as shown in FIG. 11 and FIG. 20 , a heat dissipation fin 75may be arranged inside the electric control box 7. The heat dissipationfin 75 may be thermal-conductively connected to the heat exchanging body61, and the contact area between the heat exchanging body 61 and the airin the electric control box 7 may be increased due to the heatdissipation fin 75, heat exchanging with the air may be improved, thetemperature in the mounting cavity 721 may be reduced, and the electricelements 71 may be protected.

In some embodiments, one of the electronic element 71 and the heatdissipation fin 75 may be arranged on the first extension portion 617,and the other one of the electronic element 71 and the heat dissipationfin 75 may be arranged on the second extension portion 618, and theelectronic element 71 may be misaligned with the heat dissipation fin75, and the electronic element 71 may not be interfered by the heatdissipation fin 75. Further, the distance between the electronic element71 and the heat dissipation fin 75 may be large, and the temperature ofthe cooling medium that contacts the heat dissipation fin 75 and theelectronic element 71 may be low, and the heat dissipation effect of theheat exchanging body 61 may be improved.

Further, as shown in FIG. 20 , one heat dissipation fin 75 may bearranged. A size of the heat dissipation fin 75 in the overall heightdirection of the heat exchanging body 61 may be greater than the overallheight of the heat exchanging body 61. The heat dissipation fin 75 maybe connected to the surface of the heat exchanging body 61 by welding,bonding or fastening. A smaller number of heat dissipation fins 75 maybe arranged, and the arranged heat dissipation fin 75 may have a largesurface area. On one hand, the heat dissipation fin 75 may be easilyconnected to the heat exchanging body 61, improving the efficiency ofarranging the heat dissipation fin 75 and the heat exchanging body 61.On another hand, the contact area between the heat dissipation fin 75and the air may be increased, improving the heat exchanging effect.

As shown in FIG. 21 , heat dissipation fins 75 may be arranged. A sizeof each of heat dissipation fins 75 along the overall height directionof the heat exchanging body 61 may be equal to a size of each plate bodyalong the overall height direction of the heat exchanging body 61. Eachof the heat dissipation fins 75 may be attached to one plate body. Theheat dissipation fins 75 may be spaced apart from each other andarranged along the overall height direction of the heat exchanging body61, and the contact area of the heat dissipation fins 75 and the air maybe increased. Since heat dissipation fins 75 are arranged and are spacedapart from each other, the heat exchanging efficiency of the heatdissipation fins 75 may be ensured, manufacturing materials may besaved, and production costs may be reduced.

In some embodiments, the heat dissipation fin 75 may be extended to theoutside of the electric control box. For example, the assembly port maybe defined in the box body 72, the heat exchanging body 61 may bearranged inside the box body 72 and thermal-conductively connected tothe electronic elements 71. A side of the heat dissipation fin 75 may bethermal-conductively connected to the heat exchanging body 61 andextends to the outside of the box body 72 through the assembly port, andair cooling may be applied to improve the heat dissipation effect of theheat exchanging body 61.

Heat dissipation fin may be applicable to the heat exchangers in anyforms as described herein, and shall not be limited to a particularembodiment.

6. G-Shaped Heat Exchanging Body and Engagement Between Exchanging Bodyand Electronic Elements

As shown in FIG. 22 , in the present embodiment, the structure of theheat dissipation member 6 is substantially the same as that of the heatdissipation member 6 in the above embodiments. Further, in the presentembodiment, the heat dissipation member 6 further includes a thirdextension portion 619. The first extension portion 617 and the thirdextension portion 619 are arranged side by side and are spaced apartfrom each other. The second extension portion 618 is connected betweenan end of the first extension portion 617 and an end of the thirdextension portion 619 adjacent to the end of the first extension portion617.

In detail, the third extension portion 619 is connected to an end of thesecond extension portion 618 away from the first extension portion 617and is bent towards a side of the second extension portion 618 facingtowards the first extension portion 617, and the third extension portion619 may be spaced apart from the first extension portion 617. In thisway, while the extended length of the heat exchanging body 61 remainsunchanged, the overall length and the overall width of the heatexchanging body 61 may be reduced to further reduce the size of theelectric control box 7 that is engaged with the heat dissipation member6.

In some embodiments, as shown in FIG. 22 , two second extension portions618 are arranged. The two second extension portions 618 are bent towardsand connected to two opposite ends of the first extension portion 617.One third extension portion 619 is arranged. The third extension portion619 is arranged at an end of one of the two second extension portions618 away from the first extension portion 617 and is towards the otherone of the two second extension portions 618, and a G-shaped heatexchanging body 61 is formed.

In some embodiments, two second extension portions 618 are arranged. Oneof the two second extension portions 618 is bent towards and connectedto one of two ends of the first extension portion 617. One thirdextension portion 619 is arranged. The third extension portion 619 isarranged at an end of the second extension portion 618 away from thefirst extension portion 617 and is bent towards the first extensionportion 617.

In some embodiments, two second extension portions 618 are arranged. Thetwo second extension portions 618 are bent towards and connected to twoopposite ends of the first extension portion 617. Two third extensionportions 619 are arranged. The two third extension portions 619 areconnected to ends of the two second extension portions 618 away from thefirst extension portion 617 and are extending towards each other, andthe overall length of the heat exchanging body 61 may further bereduced.

Further, the third extension portion 619 may be spaced apart from andparallel to the first extension portion 617, to avoid the thirdextension portion 619 from increasing the overall width of the heatexchanging body 61. Further, the electronic components 71 may bedisposed between the third extension portion 619 and the first extensionportion 617, the internal space of the electric control box 7 may beoptimally utilized.

In detail, the electronic elements 71 may be arranged on andthermal-conductively connected to the first extension portion 617.Further, the electronic elements 71 may be disposed between the firstextension portion 617 and the third extension portion 619. In oneembodiment, the electronic elements 71 may be arranged on andthermal-conductively connected to the third extension portion 619.Further, the electronic elements 71 may be disposed between the firstextension portion 617 and the third extension portion 619.

Since the electronic elements 71 are disposed between the firstextension portion 617 and the third extension portion 619, the spacebetween the first extension portion 617 and the third extension portion619 may be optimally utilized, the structure of the electronic elements71 and the heat exchanging body 61 may be configured to be more compact.In one embodiment, the electronic elements 71 may be arranged on boththe first extension portion 617 and the third extension portion 619, andthe electronic elements 71 may be thermal-conductively connected to boththe first extension portion 617 and the third extension portion 619. Inthis way, the heat exchange between the heat dissipation member 6 andthe electronic elements 71 may further be improved, improving theefficiency of dissipating heat from the electronic elements 71.

Further, there are various types of electronic elements 71. Theelectronic elements 71 may be classified as elements that are prone tohave failures and elements that are not prone to have failures, based onfrequencies that the elements have failures while being used. Since thespace between the first extension portion 617 and the third extensionportion 619 is limited, the electronic elements 71 may not be easilydisassembled. Therefore, in the present embodiment, the electronicelements 71 that are not prone to have failure may be disposed betweenthe first extension portion 617 and the third extension portion 619,reduce the chances of repairing the electronic elements 71.

Further, the heat dissipation fixing plate 74 may be fixed to the thirdextension portion 619 in addition to the first extension portion 617and/or the second extension portion 618 in the manner as described inthe above embodiments.

In detail, the heat dissipation fixing plate 74 may be arranged on aside of the third extension portion 619 facing towards the firstextension portion 617, and the electronic elements 71 may be arranged ona side of the heat dissipation fixing plate 74 facing towards the firstextension portion 617. In this way, the structure of the electronicelements 71 and the heat exchanging body 61 may be more compact, theinternal space of the electric control box 7 may not be excessivelyoccupied.

Similarly, in the present embodiment, the heat dissipation fin 75 may befixed to the third extension portion 619 in addition to the firstextension portion 617 and/or the second extension portion 618 in themanner as described in the above embodiments.

In detail, one of the heat dissipation fin 75 and the electronicelements 71 may be arranged on the first extension portion 617, and theother one of the heat dissipation fin 75 and the electronic elements 71may be arranged on the second extension portion 618 and/or the thirdextension portion 619, and the heat dissipation fin 75 may be misalignedwith the electronic elements 71.

In some embodiments, one heat dissipation fin 75 may be arranged. Theheat dissipation fin 75 may be arranged on the second extension portion618 or the third extension portion 619. In one embodiment, two heatdissipation fins 75 may be arranged. The two heat dissipation fins 75may be arranged on the second extension portion 618 and the thirdextension portion 619 respectively. In this way, the contact areabetween the heat dissipation fins 75 and the air may be increased,improving the heat dissipation effect of the heat dissipation member 6.

7. Heat Dissipation Plate Arranged at Position of Heat DissipationMember Having High Temperature

As shown in FIG. 23 , in the present embodiment, the electric controlbox 7 may include a box body 72, a heat dissipation member 6 and anelectronic element 71. The box body 72 defines a mounting cavity 721. Ata part of the heat dissipation member 6 is received in the mountingcavity 721, and the electronic element 71 is received in the mountingcavity 721. The structure of the box body 72 and the heat dissipationmember 6 is substantially the same as the above-mentioned embodiments,and may be referred to the description of the above-mentionedembodiments.

In some embodiments, the heat exchanging body 61 may be entirelyreceived inside the mounting cavity 721 of the electric control box 7.In one embodiment, a part of the heat exchanging body 61 may be receivedinside the mounting cavity 721 of the electric control box 7, andanother part of the heat exchanging body 61 may be protruding out of theelectric control box 7 to connect to an external tube of thefluid-collecting tube assembly 62.

Flowing of the cooling medium may allow a temperature of the heatdissipation member 6 to be low. The electronic elements 71 in theelectric control box 7 may generate heat to increase the temperature ofthe mounting cavity 721 of the electric control box 7. When the hightemperature air in the electric control box 7 contacts the heatdissipation member 6, condensation may occur, and water may be generatedon a surface of the heat dissipation member 6. When the generatedcondensed water flows to the positions of the electronic elements 71 arearranged, the electronic elements 71 may be short-circuited or damaged,or more seriously, fire may be caused.

Therefore, as shown in FIG. 23 , the heat exchanging body 61 may includea first end 61 a and a second end 61 b along a flowing direction of thecooling medium. A temperature of the heat exchanging body 61 isgradually reduced in a direction from the first end 61 a to the secondend 61 b. That is, a temperature of the first end 61 a is higher than atemperature of the second end 61 b. The electronic elements 71 arearranged at positions near the first end 61 a and arethermal-conductively connected to the heat exchanging body 61. To benoted that, since the heat exchanging body 61 needs to exchange heatwith the internal environment of the electric control box 7 or with theelements inside the electric control box 7, the temperature of the heatexchanging body 61 as described in the above and in the following refersto a temperature of the surface of the heat exchanging body 61. Indetail, a change in the temperature of the surface of the heatexchanging body 61 is determined by the heat exchanging channelsadjacent to the surface. For example, when the heat exchanging channeladjacent to the surface of the heat exchanging body 61 is the primarychannel, heat of the cooling medium in the primary channel iscontinuously absorbed by the cooling medium in the secondary channel asthe cooling media are flowing, the temperature of the surface of theheat exchanging body 61 gradually decreases along the flowing directionof the cooling medium in the primary channel. In this case, the firstend 61 a is located at an upstream of the second end 61 b along theflowing direction of the cooling medium in the primary channel. When thesurface of the heat exchanging body 61 is adjacent to the secondarychannel, the temperature of the surface of the heat exchanging body 61gradually increases along the flowing direction of the cooling medium inthe secondary channel. In this case, the first end 61 a is located at adownstream of the second end 61 b along the flowing direction of thecooling medium in the secondary channel.

Therefore, the heat exchanging body 61 may be divided into the first end61 a having the higher temperature and the second end 61 b having thelower temperature based on the change in temperature of the heatexchanging body 61. Since a temperature difference between the first end61 a having the higher temperature and the hot air may be small, nocondensed water or a less volume of condensed water may be generated.The electronic elements 71 may be arranged at positions near the firstend 61 a, and therefore, chances that the electronic elements 71 contactthe condensed water may be reduced, and the electronic elements 71 maybe protected.

To be noted that, since the air conditioner usually has therefrigerating mode and the heating mode, and in these two modes, thecooling media may flow in opposite directions. In this case, temperaturechanging trends from the first end 61 a of the heat exchanging body 61to the second end 61 b of the heat exchanging body 61 may be opposite.That is, in one mode, the temperature of the heat exchanging body 61gradually decreases from the first end 61 a to the second end 61 b, andin the other mode, the temperature of the heat exchanging body 61gradually increases from the first end 61 a to the second end 61 b. Inthe present embodiment, the priority is given to the refrigerating mode,ensuing the temperature of the heat exchanging body 61 graduallydecreases from the first end 61 a to the second end 61 b. Reasons willbe explained in the following.

When an ambient temperature is low, for example, when the airconditioning apparatus is operating to heating the environment inwinter, the temperature of the air inside the electric control box 7 islow. In this case, the temperature difference between the air inside theelectric control box 7 and the heat dissipation member 6 is small, andthe air may not be easily condensed to form condensed water. When theambient temperature is high, for example, when the air conditioningapparatus is operating to cool the environment in summer, thetemperature of the air in the electric control box 7 is high, and thetemperature difference between the air in the electric control box 7 andthe heat dissipation member 6 is high. The air may be easily condensedto form the condensed water. Therefore, in the present embodiment, atleast in the refrigerating mode, the temperature of the heat exchangingbody 61 gradually decreases in the direction from the first end 61 a tothe second end 61 b, and the condensed water may not be generated on theheat exchanging body 61 while the apparatus is operating in therefrigerating mode.

Further, arranging the electronic element 71 at a position near thefirst end 61 a means that a position where the electronic element 71 isthermal-conductively connected to the heat exchanging body 61 may be ina first distance away from the first end 61 a and may be in a seconddistance away from the second end 61 b. The first distance is less thanthe second distance.

In detail, since the temperature of the heat exchanging body 61gradually decreases in the direction from the first end 61 a to thesecond end 61 b, the first end 61 a has a highest temperature, and thesecond end 61 b has a lowest temperature. The higher the temperature ofthe heat exchanging body 61, the smaller the temperature differencebetween the heat exchanging body 61 and the air inside the electriccontrol box 7, and the condensed water is less likely to be generated.The lower the temperature of the heat exchanging body 61, the greaterthe temperature difference between the heat exchanging body 61 and thehot air, and the condensed water is more likely to be generated. Inother words, the chance of generating the condensed water graduallyincreases in the direction from the first end 61 a to the second end 61b of the heat exchanging body 61. Therefore, the electronic element 71is arranged near the higher temperature end of the heat exchanging body61, i.e., at a position where the condensed water is less likely to begenerated, and a risk of the electronic element 71 contacting thecondensed water may be reduced, and the electronic element 71 may beprotected.

Further as shown in FIG. 23 , the extension direction of the heatexchanging body 61 may be arranged to be the vertical direction, and thefirst end 61 a may be arranged at an upper of the second end 61 b. Inthis way, when the condensed water is generated at the position of theheat exchanging body 61 near the second end 61 b, the condensed watermay flow down in the vertical direction. That is, the condensed watermay flow in a direction away from the electronic element 71 to avoid theelectronic element 71 from contacting the condensed water.

In some embodiments, the extension direction of the heat exchanging body61 may be arranged to be the horizontal direction based on demands, andthe condensed water that is generated near the second end 61 b positionmay be quickly separated from the heat exchanging body 61 due to thegravitational force, preventing the electronic element 71 fromcontacting the condensed water. In some embodiments, the extensiondirection of the heat exchanging body 61 may be arranged to be inclinedat an angle with respect to the horizontal direction, which will not belimited by the present disclosure.

It shall be understood that, in the present embodiment, the structure ofthe heat dissipation member 6 may be the same as that in theabove-mentioned embodiments, i.e., a bent heat exchanging body 61 may beconfigured. In one embodiment, in the present embodiment, the structureof the heat dissipation member 6 may be arranged with a straight heatexchanging body 61. In one embodiment, besides the above-mentioned heatdissipation member 6 having the micro-channels, other types of heatdissipation members may be arranged. The present embodiments do notlimit the specific structure of the heat dissipation member 6. Inaddition, other embodiments of the present disclosure in which the heatdissipation member is applied to the electric control box may employ theheat dissipation members in any forms as disclosed in the presentdisclosure or employ any heat dissipation member available in the art.

7.1 Cooling Medium in Heat Exchanging Body Having Fixed FlowingDirection

As described in the above, since the flowing direction of the coolingmedium for cooling when the air conditioning system is in therefrigerating mode may be opposite to the flowing direction of thecooling medium for heating when the air conditioning system is in theheating mode, the temperature of the heat exchanging body 61 along theextension direction may change as the operating mode of the airconditioning system changes. It cannot be ensured that the temperatureat the first end 61 a is always higher than the temperature at thesecond end 61 b. For example, in the air conditioning system 1 shown inFIG. 1 , the flowing direction of the cooling medium in the first heatexchanging channel 610 (primary channel) in the refrigerating mode maybe opposite to the flowing direction of the cooling medium in the firstheat exchanging channel 610 (primary channel) in the cooling mode.

Therefore, as shown in FIG. 23 , the electric control box furtherincludes a first unidirectional guiding member 701, a secondunidirectional guiding member 702, a third unidirectional guiding member703 and a fourth unidirectional guiding member 704. An inlet of thefirst unidirectional guiding member 701 is connected to an end of theindoor unit (such as the indoor heat exchanger 5 in FIG. 1 ), and anoutlet of the first unidirectional guiding member 701 is connected tothe fluid-collecting tube assembly 62 near the first end 61 a. An inletof the second unidirectional guiding member 702 is connected to thefluid-collecting tube assembly 62 near the second end 61 b, and anoutlet of the second unidirectional guiding member 702 is connected tothe end of the indoor unit. An inlet of the third unidirectional guidingmember 703 is connected to an end of a flow adjustment valve (such asthe expansion valve 13 in FIG. 1 ), and an outlet of the thirdunidirectional guiding member 703 is connected to the fluid-collectingtube assembly 62 near the first end 61 a. An inlet of the fourthunidirectional guiding member 704 is connected to the fluid-collectingtube assembly 62 near the second end 61 b, and an outlet of the fourthunidirectional guiding member is connected to the end of the flowadjustment valve.

The air conditioning system 1 is in the refrigerating mode. The coolingmedium output from the compressor 2 flows to the outdoor heat exchanger4 for heat exchanging. The cooling medium continues flowing to the flowadjustment valve (the expansion valve 13), and further flows through thethird unidirectional guiding member 703 to enter the fluid-collectingtube assembly 62 near the first end 61 a. Further, the cooling mediumflows through the heat exchanging body 61 to reach the second end 61 b.In this way, in the direction from the first end 61 a to the second end61 b, heat exchanging may occur between the cooling medium and thesecondary channel (i.e., the cooling medium may be sub-cooled). In thisway, the temperature of the heat exchanging body 61 decreases in thedirection from the first end 61 a to the second end 61 b. The coolingmedium flowing from the second end 61 b may flow through the secondunidirectional guiding member 702 to reach the indoor heat exchanger 5for heat exchanging.

The air conditioning system 1 is in the heating mode. The cooling mediumoutput from the compressor 2 flows to the indoor heat exchanger 5 forheat exchanging. The cooling medium continues flowing to the electriccontrol box 7, and further flows through the first unidirectionalguiding member 701 to enter the fluid-collecting tube assembly 62 nearthe first end 61 a. Further, the cooling medium flows through the heatexchanging body 61 to reach the second end 61 b. In this way, in thedirection from the first end 61 a to the second end 61 b, heatexchanging may occur between the cooling medium and the secondarychannel (i.e., the cooling medium may be sub-cooled). In this way, thetemperature of the heat exchanging body 61 decreases in the directionfrom the first end 61 a to the second end 61 b. The cooling mediumflowing from the second end 61 b may flow through the fourthunidirectional guiding member 704 to reach the outdoor heat exchanger 4for heat exchanging.

Therefore, in the present disclosure, four unidirectional guidingmembers are arranged between the first end 61 a and the second end 61 b,allowing the cooling medium in the heat exchanging body 61 to flow alonga fixed direction, and the electronic element 71 is always disposed on ahigher temperature position of the heat exchanging body 61, preventingthe electronic element 71 from contacting the generated condensed water.

In some embodiments, each of the first unidirectional guiding member701, the second unidirectional guiding member 702, the thirdunidirectional guiding member 703 and the fourth unidirectional guidingmember 704 may be configured as a one-way valve. In some embodiments,each of the first unidirectional guiding member 701, the secondunidirectional guiding member 702, the third unidirectional guidingmember 703 and the fourth unidirectional guiding member 704 may beconfigured as an electromagnetic valve. The present disclosure does notlimit a type of the unidirectional guiding member.

8. Mounting Plate Prevents Condensed Water from Flowing Out

As shown in FIG. 24 , the electric control box 7 in the presentembodiment includes a box body 72, a mounting plate 76, an electronicelement 71 and a heat dissipation member 6.

The box body 72 defines a mounting cavity 721, and the mounting plate 76is received in the mounting cavity 721, and the mounting cavity 721 isdivided into a first cavity 7212 and a second cavity 7214 located on twosides of the mounting plate 76. The electronic element 71 is received inthe second cavity 7214. At least a part of the heat exchanging body 61is received in the first cavity 7212 and is thermal-conductivelyconnected to the electronic element 71. The mounting plate 76 isconfigured to prevent the condensed water on the heat dissipation member6 from flowing into the second cavity 7214.

The mounting plate 76 is arranged inside the electric control box 7 todivide the mounting cavity 721, and the heat exchanging body 61 and theelectronic element 71 are respectively received in the first chamber7212 and the second chamber 7214. In this way, the electronic element 71may be completely separated from the condensed water, preventing theelectronic element 71 from being short-circuited or damaged due tocontacting the condensed water.

Further, the heat dissipation fixing plate 74 may be arranged toindirectly connect the electronic v 71 to the heat exchanging body 61.

In detail, the mounting plate 76 may define an avoidance hole 762 at aposition corresponding to the heat dissipation fixing plate 74. The heatdissipation fixing plate 74 is connected to the heat exchanging body 61and blocks the avoidance hole 762. The electronic element 71 is arrangedon a side of the heat dissipation fixing plate 74 away from the heatexchanging body 61. In this way, the heat dissipation fixing plate 74may be configured to enable the electronic element 71 to bethermal-conductively connected to the heat exchanging body 61. Further,the heat dissipation fixing plate 74 may be configured to separate thefirst cavity 7212 from the second cavity 7214. Therefore, the condensedwater may be prevented from flowing through the avoidance hole 762 toreach the second cavity 7214 in which the electronic element 71 isarranged, and the condensed water may be prevented from contacting theelectronic element 71.

Further, when a large amount of condensed water is generated on the heatexchanging body 61, the condensed water may be accumulated and fall dueto the gravitational force. The dropped condensed water may generatenoise, and condensed water, which is rapidly distributed, may not bedischarged out of the electric control box 7 easily.

Therefore, as shown in FIG. 24 , a guiding plate 77 is arranged insidethe electric control box 7. The guiding plate 77 may be arranged on alower side of the heat dissipation member 6 to collect the condensedwater dripping from the heat dissipation member 6. By arranging theguiding plate 77, a height that the condensed water drops may bereduced, and the noise may be reduced. Further, the guiding plate 77 mayaccumulate the condensed water, and the condensed water may beaccumulated and further discharged out of the electric control box 7.

As shown in FIG. 24 , the heat dissipation member 6 is fixed to thebottom plate 723 of the electric control box 7. An end of the guidingplate 77 is connected to the bottom plate 723, and the other end of theguiding plate 77 extends towards an interior of the first cavity 7212.Further, a projection of the heat dissipation member 6 along thevertical direction locates in the guiding plate 77. In this way, thecondensed water from the heat dissipation member 6 drops to reach theguiding plate 77, preventing the condensed water from dropping to reachother locations of the electric control box 7.

It shall be understood that, the heat dissipation member 6 may bearranged on the mounting plate 76. In this case, an end of the guidingplate 77 is connected to the mounting plate 76, and the other end of theguiding plate 77 extends towards the interior of the first cavity 7212.Further, the projection of the heat dissipation member 6 along thevertical direction is located in the guiding plate 77.

Further, as shown in FIG. 25 , in order to discharge the condensed wateron the guiding plate 77 out of the electric control box 7 in time, adrainage hole 725 may be defined in a bottom wall of the box body 72,and the guiding plate 77 may be inclined at an angle with respect to thebottom wall of the box body 72. The condensed water is guided by theguiding plate 77 and discharged from the box body 72 through thedrainage hole 725.

In detail, the drainage hole 725 may be defined in the circumferentialside plate 724 of the electric control box 7. The guiding plate 77 isconnected to the mounting plate 76 or the bottom plate 723 of the boxbody 72 and is inclined towards the drainage hole 725. After thecondensed water drops on the guiding plate 77, the condensed water mayflow along the inclined guiding plate 77 to be collected at the positionwhere the drainage hole 725 is defined, and may be drained out of theelectric control box 7 from the drainage hole 725.

The number and sizes of drainage holes 725 may be determined flexiblybased on the amount of condensed water, and will not be limited herein.

In the present embodiment, the flowing direction of the cooling mediumin the heat exchanging body 61 may be configured to be the horizontaldirection. That is, the extension direction of the heat exchanging body61 may be the horizontal direction. On one hand, a path that thecondensed water flows in the heat exchanging body 61 may be reduced, andthe condensed water may drop down to the guiding plate 77 due to thegravitational force as soon as possible, enabling the condensed water tobe discharged out of the electric control box 7 in time, preventing thecondensed water from contacting the electronic element 71 arrangedinside the mounting cavity 721. On the other hand, the guiding plate 77may be prevented from interfering with the heat exchanging body 61, anda relatively long heat exchanging body 61 may be arranged, improving theheat exchanging efficiency of the heat dissipation member 6.

9. Heat Dissipation Plate Arranged at Position of Heat DissipationMember Having High Temperature, and Condensed Water being Vaporized toDissipate Heat

As shown in FIG. 26 , the electric control box 7 in the presentembodiment includes a box body 72, a mounting plate 76 and a heatdissipation member 6.

The box body 72 defines a mounting cavity 721, and the mounting plate 76is received in the mounting cavity 721, and the mounting cavity 721 isdivided into a first cavity 7212 and a second cavity 7214 located on twosides of the mounting plate 76. The mounting plate 76 defines a firstair vent 764 and a second air vent 766. The first air vent 764 and thesecond air vent 766 are spaced apart from each other. In this way, gasin the first cavity 7212 flows into the second cavity 7214 via the firstair vent 764 and gas in the second cavity 7214 flows into the firstcavity 7212 via the second air vent 766. At least a part of the heatexchanging body 61 is received in the first cavity 7212. A flowingdirection of a part of the cooling medium in the heat exchanging body 61is configured to be a direction that the first air vent 764 is spacedapart from the second air vent 766. The temperature of the heatexchanging body 61 gradually increases in the direction from the secondair vent 766 to the first air vent 764. That is, a temperature of aposition of the heat exchanging body 61 near the first air vent 764 ishigher than a temperature of a position of the heat exchanging body 61near the second air vent 766. As described above, the cooling mediumherein may be the cooling medium in the primary channel or in thesecondary channel in the air conditioning system shown in FIG. 1 .

In the present embodiment, the heat exchanging body 61 may be arrangedin the horizontal direction, in the vertical direction or in otherdirections, which will not be limited herein. In addition, the number,positions and extension directions of first air vents 764 and second airvents 766 are not limited herein.

Since the temperature of a side of the heat exchanging body 61 near thesecond air vent 766 is low, the amount of condensed water generated atthe position near the second air vent 766 may be large. In the presentembodiment, the mounting plate 76 is arranged inside the electriccontrol box 7 and defines the first air vent 764 and the second air vent766 along the flowing direction of the cooling medium, and the first airvent 764 may be spaced apart from the second air vent 766. When the hightemperature air in the second cavity 7214 enters the first cavity 7212through the second air vent 766, the air may contact the condensedwater, and the condensed water may be vaporized. In this way, on onehand, the condensed water may be prevented from being accumulated, anddrainage structures may be omitted. On the other hand, the condensedwater may be vaporized and absorb heat to reduce the temperature of theheat dissipation member 6. The temperature of the cooling medium in theheat dissipation member 6 may be reduced, and the heat exchangingperformance of the heat dissipation member 6 may be improved.

To be noted that, the flowing direction of the cooling medium in theheat exchanging body 61 is configured to be a direction that the firstair vent 764 is spaced apart from the second air vent 766. In this case,the flowing direction of the cooling medium may be parallel to or may beat an angle relative to direction that the first air vent 764 is spacedapart from the second air vent 766.

As described in the above, since the air conditioners generally have therefrigerating mode and the heating mode, the flowing direction of thecooling medium in the refrigerating mode may be opposite to the flowingdirection of the cooling medium in the heating mode. Therefore, thepriority is given to the refrigerating mode, the temperature of the heatexchanging body 61 is ensured to increase gradually in the directionfrom the second air vent 766 to the first air vent 764. Reasons will beexplained in the following.

When the ambient temperature is low, for example, when the airconditioning apparatus is operating to heat the environment in winter,the temperature of the air inside the electric control box 7 is low, thetemperature difference between the air inside the electric control box 7and the heat dissipation member 6 is small. The air may not be condensedinto water easily. When the ambient temperature is high, for example,when the air conditioning apparatus is operating to cool the environmentin summer, the temperature of the air in the electric control box 7 ishigh, and the temperature difference between the air in the electriccontrol box 7 and the heat dissipation member 6 is high. Therefore, theair may be easily condensed into water. Therefore, in the presentembodiment, at least in the refrigerating mode, the temperature of theheat exchanging body 61 may gradually increase in the direction from thesecond air vent 766 to the first air vent 764, preventing the condensedwater from being generated on the heat dissipation member 6 in therefrigerating mode.

Further, the electric control box 7 may further include an electronicelement 71, and the electronic element 71 is thermal-conductivelyconnected to the heat dissipation member 6, and heat may be dissipatedfrom the electronic element 71 by the heat dissipation member 6.

In some embodiments, the electronic element 71 may be received in thefirst cavity 7212. In order to reduce the possibility that theelectronic element 71 contacts the condensed water, the electronicelement 71 may be arranged at a position of the heat exchanging body 61near the first air vent 764 and may be thermal-conductively connected tothe heat exchanging body 61.

In detail, while air is flowing from the second air vent 766 to thefirst air vent 764, heat exchanging may continuously occur between theair and the heat dissipation member 6, the temperature of the airgradually decreases. Further, the temperature of the heat exchangingbody 61 near the first air vent 764 is high, and therefore, thetemperature difference between the air and the heat dissipation member 6may be reduced to reduce a possibility that the air is condensed at theposition of the heat exchanging body 61 near the first air vent 764. Theelectronic element 71 is arranged at the position of the heat exchangingbody 61 near the first air vent 764. In this way, the electronic element71 may be prevented from contacting condensed water, and the electronicelement 71 arranged on the heat exchanging body 61 may be protected.

In some embodiments, the first air vent 764 and the second air vent 766may be spaced apart from each other along the horizontal direction. Inthis case, the extension of the heat exchanging body 61 may be along thehorizontal direction. When the amount of the condensed water generatednear the second air vent 766 is excessively large and cannot bevaporized in time, the condensed water may flow down in the verticaldirection. Since the length of the heat exchanging body 61 in thevertical direction is small, the condensed water may leave the heatexchanging body 61 after flowing for a distance, resulting in thecondensed water being dropped.

Therefore, in order to avoid the condensed water from being dropped, thefirst air vent 764 and the second air vent 766 may be spaced apart fromeach other along the vertical direction, the first air vent 764 isarranged at an upper of the second air vent 766, and the extensiondirection of the heat exchanging body 61 may be the vertical direction.In this case, when the amount of the condensed water generated near theposition of the second air vent 766 is excessively large and cannot bevaporized in time, the condensed water may flow along the verticaldirection. Since the length of the heat exchanging body 61 is largealong the vertical direction, a flowing path of the condensed water maybe increased, and the contact area between the hot air and the condensedwater may be increased, and the amount of the condensed water that maybe vaporized may be increased, and the condensed water may be preventedfrom being dropping. The first air vent 764 is arranged at the upper ofthe second air vent 766, and the electronic element 71 is arranged atthe position near the first air vent 764, and the condensed water mayflow in a direction away from the electronic element 71, and theelectronic element 71 may be prevented from contacting the condensedwater.

In some embodiments, the electronic element 71 may also be arrangedinside the second cavity 7214 and may be thermal-conductively connectedto the heat dissipation member 6 via the heat dissipation fixing plate74. Connection between the electronic element 71 and the heatdissipation fixing plate 74 may be the same as and referred to the aboveembodiments.

Further, in order to increase a flowing speed of air in the first cavity7212 and in the second cavity 7214, a cooling fan 78 may be arrangedinside the electric control box 7 to increase the air ventilation effectof the first cavity 7212 and the second cavity 7214.

As shown in FIG. 26 , the cooling fan 78 may be received in the secondcavity 7214. The cooling fan 78 in the second cavity 7214 may provide aforced ventilation enables the air to flow from the second air vent 766to the first cavity 7212.

In detail, since the electronic element 71 is received in the secondcavity 7214, the heat generated while the electronic element 71 isoperating may enable the temperature in the second cavity 7214 to behigher than the temperature in the first cavity 7212. By arranging thecooling fan 78 in the second cavity 7214, the speed that the hightemperature air flows from the second air vent 766 to the first cavity7212 may be increased in order to enhance the speed that the condensedwater is vaporized.

Further, the cooling fan 78 may be arranged at the position near thefirst air vent 764 to increase a distance between the cooling fan 78 andthe second air vent 766, increasing an operating range of the coolingfan 78, and the cooling fan 78 may drive more air to flow into thesecond air vent 766.

Further, a temperature sensor (not shown in the drawings) may bearranged inside the electric control box 7. The temperature sensor maybe configured to detect the temperature in the second cavity 7214. Inthis way, when the temperature sensor detects that the temperature inthe second cavity 7214 is greater than a temperature threshold, thecooling fan 78 may be controlled to start operating, or an operatingspeed of the cooling fan 78 may be increased.

In detail, the temperature sensor may be arranged within the secondcavity 7214 of the electric control box 7 to detect the temperature ofthe second cavity 7214. When the heat generated due to the electronicelement 71 being operating is relatively large, causing the temperatureinside the second cavity 7214 to be greater than the temperaturethreshold, the temperature sensor may be triggered and transmit a hightemperature trigger signal to a main board. The main board may turn onthe cooling fan 78 to accelerate the flowing speed of the air inside thesecond cavity 7214, and a speed that the air circulates between thefirst cavity 7212 and the second cavity 7214 may be increased, and thespeed that the condensed water is vaporized may be increased. When thetemperature within the second cavity 7214 decreases and is below thetemperature threshold, the temperature sensor may be triggered andtransmit a low temperature trigger signal to the main board, and themain board may turn off the cooling fan 78 to save energy.

The value of the temperature threshold may be determined as required andwill not be limited by the present disclosure.

10. Arranging Heat Dissipation Plate on Upstream of Heat DissipationMember, Arranging Heat Dissipation Fin on Downstream of Heat DissipationMember

As shown in FIG. 27 , the electric control box 7 in the presentembodiment includes a box body 72, a heat dissipation member 6, anelectric element 71 and a heat dissipation fin 5.

The box body 72 defines a mounting cavity 721. At least a part of theheat exchanging body 61 is received in the mounting cavity 721. Theelectronic element 71 is thermal-conductively connected to the heatexchanging body 61 at a first position, and the heat dissipation fin 75is thermal-conductively connected to the heat exchanging body 61 at asecond position. The first position and the second position are spacedapart from each other along the flowing direction of the cooling mediumof the heat exchanging body 61. As described above, the cooling mediumherein may be the cooling medium in the primary channel or in thesecondary channel in the air conditioning system shown in FIG. 1 .

In the present embodiment, the electronic element 71 and the heatdissipation fin 75 are spaced apart from each other along the flowingdirection of the cooling medium of the heat exchanging body 61. Thespace on the heat exchanging body 61 may be optimally utilized. The heatexchanging body 61 may dissipate heat from the electronic element 71.Further, the heat dissipate fin 75 may be configured to reduce thetemperature in the mounting cavity 721 of the electric control box 7,and the electronic elements 71 arranged inside the mounting cavity 721may be protected.

Further, the heat exchanging body 61 includes the first end 61 a and thesecond end 61 b. The first end 61 a and the second end 61 b are spacedapart from each other along the flowing direction of the cooling medium.The temperature of the heat exchanging body 61 decreases gradually inthe direction from the first end 61 a to the second end 61 b. That is,the temperature of the first end 61 a is higher than the temperature ofthe second end 61 b. Compared to the second position, the first positionmay be closer to the first end 61 a.

In detail, while the heat exchanging body 61 is operating, since thetemperature of the surface of the heat exchanging body 61 may changealong with the flowing direction of the cooling medium, the temperatureof the first end 61 a may be higher than the temperature of the secondend 61 b. Since a temperature difference between the higher temperaturefirst end 61 a and the hot air in the mounting cavity 721 is relativelysmall, the condensed water may be less likely generated. Therefore, theelectronic element 71 may be arranged near the first end 61 a, i.e., thefirst position is a position near the first end 61 a. Since atemperature difference between the lower temperature second end 61 b andthe hot air in the mounting cavity 721 is relatively large, thecondensed water may be more likely generated. Therefore, the heatdissipation fin 75 may be arranged near the second end 61 b. On onehand, the lower temperature of the heat dissipation fin 75 may allow thetemperature difference between the heat dissipation fin 75 and the hotair to be large, and the heat may be dissipated from the electriccontrol box 7. On the other hand, the condensed water formed on the heatdissipation fin 75 may be vaporized due to the hot air. Evaporation ofthe condensed water may absorb heat to further reduce the temperature ofthe cooling medium, improving the heat exchanging effect of the heatdissipation member 6.

10.1 Increasing Flowing Speed of Heat Dissipation Air

Further, the cooling fan 78 is arranged inside the electric control box7. The cooling fan 78 is configured to generate a heat dissipationairflow on the heat dissipation fin 75 in the electric control box 7. Inthis way, the flowing speed of the heat dissipation airflow may beincreased, improving the heat exchanging effect.

In some embodiments, the cooling fan 78 may be arranged at a positionnear the heat dissipation fin 75 to act directly on the heat dissipationfin 75.

In some embodiments, as shown in FIG. 28 , the mounting plate 76 isarranged inside the electric control box 7. The mounting plate 76 isreceived in the mounting cavity 721, and the mounting cavity 721 isdivided into the first cavity 7212 and the second cavity 7214, and thefirst cavity 7212 and the second cavity 7214 are located on two sides ofthe mounting plate 76, respectively. The mounting plate 76 defines thefirst air vent 764 and the second air vent 766 spaced apart from thefirst air vent 764, and the gas in the first cavity 7212 flows into thesecond cavity 7214 through the first air vent 764, and the gas in thesecond cavity 7214 flows into the first cavity 7212 through the secondair vent 766. At least a part of the heat exchanging body 61 is receivedin the first cavity 7212, and the electronic element 71 and the coolingfan 78 are received in the second cavity 7214.

In the present embodiment, the mounting plate 76 is configured to dividethe mounting cavity 721 into two independent cavities, the first cavity7212 and the second cavity 7214, and a circulating airflow may begenerated in the first cavity 7212 and the second cavity 7214.Therefore, the amount of air that contacts the heat dissipation fin 75received in the first cavity 7212 may be increased, and cooled air maydissipate heat from the electronic element 71 received in the secondcavity 7214, airflows may not be mixed, and the heat dissipationefficiency of the heat dissipation fin 75 may be improved.

The cooling fan 78 received in the second cavity 7214 is configured toincrease the flowing speed of the air in the second cavity 7214, and thespeed that the air circulates between the first cavity 7212 and thesecond cavity 7214 may be increased, and the efficiency of dissipatingheat from the electric control box 7 may be increased.

Further, a direction that the heat dissipation air flows along the heatdissipation fin 75 may be configured to be perpendicular to the flowingdirection of the cooling medium.

As shown in FIG. 27 and FIG. 28 , when the cooling medium in the heatexchanging body 61 is flowing in the horizontal direction, the heatdissipation air may be configured to flow in the vertical direction, andthe heat dissipation air may not flow to the position where theelectronic element 71 is arranged.

In detail, the first air vent 764 and the second air vent 766 may bespaced apart from each other along the vertical direction and aredisposed on opposite sides of the heat dissipation fin 75. The numberand an arrangement density of first air vents 764 and the number and anarrangement density of second air vents 766 may be determined based ondemands.

In some embodiments, when the cooling medium in the heat exchanging body61 is flowing in the vertical direction, the heat dissipation air may beconfigured to flow in the horizontal direction, and the heat dissipationair may not flow to the position where the electronic element 71 isarranged. In some embodiments, the flowing direction of the heatdissipation air and the flowing direction of the cooling medium may bealong another two perpendicular directions, which will not be limited bythe present disclosure.

Further, when the first air vent 764 and the second air vent 766 arearranged in the vertical direction, the first air vent 764 may bearranged at an upper of the second air vent 766, and the hot airentering the first cavity 7212 through the second air vent 766 mayautomatically flow to the position where the heat exchanging body 61 isarranged, and heat exchanging may occur between the hot air and the heatexchanging body 61.

In some embodiments, the cooling fan 78 may be arranged at the positionnear the first air vent 764, and cold air located at a top of the firstcavity 7212 may enter the second cavity 7214 in time, and the coolingfan 78 may accelerate the cold air to increase the efficiency ofdissipating heat from the electronic element 71.

11. Internal Circulation

Generally, in order to cool down the electric control box 7, a heatdissipation hole may be defined in the box body 72 of the electriccontrol box 7 and may be communicated with the mounting cavity 721, andthe air inside the box may be circulated with the air out of the box toachieve heat exchanging, and the electric control box 7 may be cooleddown. However, when the box body 72 defines the heat dissipation hole,air tightness of the electric control box 7 may be reduced, impurities,such as water and dust at the outside of the box, may enter the mountingcavity 721 through the heat dissipation hole, and the electronic elementarranged in the mounting cavity 721 may be damaged.

In the present embodiment, in order to solve the above problem, the boxbody 72 of the electric control box 7 may be configured as a sealed boxbody. In detail, as shown in FIG. 29 , the electric control box 7 mayinclude the box body 72, the mounting plate 76, the heat dissipationmember 6, the electronic element 71 and the cooling fan 78.

The box body 72 defines the mounting cavity 721. The mounting plate 76is received in the mounting cavity 721, and the mounting cavity 721 isdivided into the first cavity 7212 and the second cavity 7214, and thefirst cavity 7212 and the second cavity 7214 are located on two sides ofthe mounting plate 76, respectively. The mounting plate 76 defines thefirst air vent 764 and the second air vent 766 spaced apart from thefirst air vent 764. The first air vent 764 and the second air vent 766are communicated with the first cavity 7212 and the second cavity 7214.At least a part of the heat exchanging body 61 is received in the firstcavity 7212, and the electronic element 71 is received in the secondcavity 7214 and is thermal-conductively connected to the heatdissipation member 6. The cooling fan 78 is configured to supply air,and the gas in the first cavity 7212 flows into the second cavity 7214through the first air vent 764.

In the present embodiment, at least a part of the heat dissipationmember 6 is received in the first cavity 7212, and the electronicelement 71 and the cooling fan 78 are received in the second cavity7214. The mounting plate 76 defines the first air vent 764 and thesecond air vent 766 spaced apart from the first air vent 764, and thefirst air vent 764 and the second air vent 766 are communicated with thefirst cavity 7212 and the second cavity 7214. In this way, the heatgenerated by the electronic element 71 causes the air in the secondcavity 7214 to be increased, the cooling fan 78 drives the hot air toflow into the second air vent 766. Since the hot air has a low density,the hot air may flow upwardly to contact the heat dissipation member 6received in the first cavity 7212. The heat dissipation member 6 maycool the hot air into cold air. The cold air flows into the secondcavity 7214 through the first air vent 764. The cooling fan 78 isconfigured to accelerate the flowing speed of the cold air. In this way,the cold air may be taken to cool the electronic element 71 received inthe second cavity 7214. A temperature of the cold air, which exchangesheat with the electronic element 71, may be increased, and the cold air,which has the increased temperature, may be driven by the cooling fan 78to enter the second air vent 766. The above circulation may occurperiodically. In this way, the internal circulation may be generated tocool the electronic element 71 received in the electric control box 7.Compared to defining the heat dissipation hole in the electric controlbox 7 to cool the control box, in the present embodiment, the electriccontrol box 7 may be completely sealed, and waterproof, insect-proof,dust-proof and moisture-proof may be achieved, and the reliability ofthe electric control box 7 may be improved.

As shown in FIG. 29 , the cooling fan 78 is mounted in the first airvent 764. A plane in which the cooling fan 78 is located may be coplanarwith a plane in which the mounting plate 76 is located.

In detail, the cooling fan 78 may be fixedly arranged in the first airvent 764 by a fan bracket (not shown in the drawings). The plane inwhich the cooling fan 78 is located may refer to a plane perpendicularto a direction of a rotational axis of the cooling fan 78. Since thecooling fan 78 is arranged in the first air vent 764, a distance betweenthe cooling fan 78 and the first cavity 7212 may be reduced, and thecold air may be easily discharged out of the first cavity 7212. Further,the cooling fan 78 may not occupy any space of the second cavity 7214,and elements inside the electric control box 7 may be arranged morecompact, and the size of the electric control box 7 may be reduced.

The electronic element 71 is usually arranged on the mounting plate 76.Therefore, when the plane in which the cooling fan 78 is located iscoplanar with the plane in which the mounting plate 76 is located, theflowing direction of the air of the cooling fan 78 may be perpendicularto the plane in which the mounting plate 76 is located. In this way, theflowing direction of the air of the cooling fan 78 may not act directlyon the electronic element 71, and a path that the air flows in thesecond cavity 7214 may be increased.

Therefore, as shown in FIG. 11 and FIG. 29 , an air guiding cover 79 maybe arranged inside the electric control box 7. The air guiding cover 79may be arranged to cover a periphery of the cooling fan 78 andconfigured to guide the air blown by the cooling fan 78, and the airblown from the cooling fan 78 may be directed towards the electronicelement 71.

In detail, the air guiding cover 79 is connected to the mounting plate76. An air outlet of the air guiding cover 79 faces towards the positionwhere the electronic element 71 is arranged. In this way, the air blownby the cooling fan 78, after being guided by the air guiding cover 79,may flow to the position where the electronic element 71 is arranged. Onone hand, the cold air may act directly on the electronic element 71 toincrease the efficiency of dissipating heat from the electronic element71. On the other hand, the air guiding cover 79 may increase a speedthat the cold air flows through the electronic element 71, and theefficiency of dissipating heat from the electronic element 71 mayfurther be improved.

In an embodiment, as shown in FIG. 30 , the plane in which the coolingfan 78 is located is perpendicular to the plane in which the mountingplate 76 is located, and a leeward side of the cooling fan 78 may facetowards the first air vent 764.

In detail, the cooling fan 78 may be arranged on a side of the mountingplate 76 facing the second cavity 7214. The direction of the rotationalaxis of the cooling fan 78 may be parallel to the plane in which themounting plate 76 is located. The leeward side of the cooling fan 78 mayrefer to an air inlet side of the cooling fan 78. In the presentembodiment, the cooling fan 78 may be disposed between the first airvent 764 and the electronic element 71. The cold air that enters thesecond cavity 7214 via the first air vent 764 is accelerated by thecooling fan 78 and subsequently flows out, and the flowing speed of thecold air may be increased, and the efficiency of dissipating heat fromthe electric control box 7 may be increased.

Further, as shown in FIG. 30 , in order to enable the entire cold airthat enters through the first air vent 764 to be accelerated by thecooling fan 78, the electric control box 7 may further define a returnair duct 791. The return air duct 791 may be communicated between thefirst air vent 764 and the cooling fan 78 to direct the air in the firstcavity 7212 to flow to the cooling fan 78. In this way, the cold airthat enters through the first air vent 764 is all directed to thecooling fan 78 through the return air duct 791 and is accelerated by thecooling fan 78, and the flowing speed of the cold air may be increased,and the efficiency of dissipating heat from the electric control box 7may be increased.

Further, as shown in FIG. 30 , the electric control box 7 may furtherdefine an air supply duct 792. The air supply duct 792 may be connectedto a side of the cooling fan 78 away from the return air duct 791 andconfigured to guide the air blown by the cooling fan 78, and the air,after being guided by the air supply duct 792, may be directed towardsthe electronic element 71.

In detail, the air supply duct 792 may be configured to direct the airblown by the cooling fan 78, and the air blown out of the cooling fan 78may be directed towards the electronic element 71. In this way, aproportion of the cool air flowing to the position where the electronicelement 71 is arranged may be increased, and the efficiency ofdissipating heat from the electronic element 71 may be increased.

In some embodiments, as shown in FIG. 31 , the cooling fan 78 may be acentrifugal fan.

For the centrifugal fan, a mechanical energy input to the fan may betaken to increase an air pressure, and the air may be output. A workingprinciple of the centrifugal fan may refer to taking a high-speedrotating impeller to accelerate the air. Therefore, in the presentembodiment, the cooling fan 78 is configured as the centrifugal fan. Onone hand, a high speed cold air may be obtained to improve theefficiency of cooling the electronic element 71. On the other hand,compared to the cooling fan 78 with the return air duct 791 and airsupply duct 792, the centrifugal fan may have a simplified structure, anefficiency of mounting the cooling fan 78 may be increased.

In some embodiments, when electronic elements 71 are rapidlydistributed, arranging the air guiding cover 79 and defining the airsupply duct 792 may allow the direction of the guided air to be fixed.Although efficiencies of dissipating heat from some electronic elements71 that are located along the air flowing direction may be increased,electronic elements 71 that are highly deviated from the air flowingdirection may not be cooled effectively.

Therefore, air guiding plates (not shown in the drawings) may be spacedapart from each other and arranged on the mounting plate 76. An airguiding channel may be formed between adjacent air guiding plates andconfigured to direct the air blown by the cooling fan 78.

For example, two parallel air guiding plates, which are spaced apartfrom each other, may be arranged between the rapidly distributedelectronic elements 71. An extension direction of the air guiding platemay follow a direction that the electronic elements 71 are spaced apartfrom each other, and the two air guiding plates may define the airguiding channel along the direction that the electronic elements 71 arespaced apart from each other. The cool air blown by the cooling fan 78firstly flows to positions of a part of the electronic elements 71 todissipate heat from the part of electronic elements 71. The air thatpasses through the part of the electronic elements 71 further flowsalong the air guiding channel to reach positions of another part of theelectronic elements 71 for dissipating heat from the another part of theelectronic elements 71. In this way, the heat of the electronic elements71 may be dissipated uniformly, temperatures of a part of electronicelements 71 may not be excessively high, and the part of electronicelements 71 may not be damaged.

The heat dissipation member 6 may be arranged inside the electriccontrol box 7. That is, the heat exchanging body 61 may be arrangedinside the first cavity 7212 to cool the air in the first cavity 7212.

In some embodiments, the heat dissipation member 6 may be arranged onthe outside of the electric control box 7, and at least a part of theheat dissipation member 6 is extending into the first cavity 7212. Forexample, when the heat dissipation member 6 includes the heat exchangingbody 61, the fluid-collecting tube assembly 62 and the heat dissipationfin 75, the box body 72 may define an assembly port (not shown)communicated with the first cavity 7212. In this case, the heatexchanging body 61 is connected to an outer wall of the box body 72, andthe heat dissipation fin 75 is connected to the heat exchanging body 61and inserted into the first cavity 7212 through the assembly port.

In the present embodiment, engagement between the heat dissipationmember 6 and the electric control box 7 may be the same as and may berefer to the engagement described in the above embodiments, and will notbe repeated herein.

As shown in FIG. 31 , the electronic element 71 may be disposed within arange covered by the air supplied by the cooling fan 78, and the coolingfan 78 may act directly on the electronic elements 71 to cool theelectronic elements 71.

The electronic elements 71 may include primary heating elements andsecondary heating elements. The primary heating elements, such as acommon mode inductor 711, a reactor 712 and a capacitor 713, maygenerate a large amount of heat. The secondary heating elements, such asa fan module 714, may generate less heat. In order to improve theefficiency of dissipating heat from the primary heating elements, adistance between the primary heating elements and the first air vent 764may be configured to be less than a distance between the secondaryheating elements and the first air vent 764. That is, the primaryheating elements, which may generate larger amount of heat, may bearranged at positions near the first air vent 764. The secondary heatingelements, which may generate less amount of heat, may be arranged atpositions away from the first air vent 764. In this way, the air, whichhas a relatively low temperature and enters through the first air vent764, may firstly act on the primary heating elements which may generatelarger amount of heat, and the efficiency of dissipating heat from theprimary heating elements, which may generate larger amount of heat, maybe increased.

In some embodiments, the second air vent 766 may be defined at an end ofthe air supplied by the cooling fan 78 and at a position near theelectronic elements 71, which may generate larger amount of heat. On onehand, an operating range of the cooling fan 78 may be expanded, and acirculation efficiency of the air in the second cavity 7214 may beincreased. On the other hand, the hot air, after exchanging heat withthe electronic elements 71 which may generate larger amount of heat, maybe discharged from the second cavity 7214 in time, preventing thetemperature of the second cavity 7214 from being increased.

Further, the second air vent 766 may be defined at a position near thefirst air vent 764 to reduce a path that the air circulates in thesecond cavity 7214, a resistance to air flowing may be reduced, an aircirculation efficiency may be increased, and the efficiency ofdissipating heat from the electric control box 7 may be improved.

Further, a size of the first air vent 764 and a size of the second airvent 766 may be determined based on the arrangement of the electronicelements 71.

In detail, second air vents 766 may be defined. The second air vents 766may be defined at different positions of the mounting plate 76. A sizeof the second air vent 766 defined at the position near the electronicelements 71, which generate larger amount of heat, may be relativelylarge. The number of second air vents 766 near the primary electronicelements may be relatively large. The second air vents 766 near theprimary electronic elements may be densely distributed. A size of thesecond air vent 766 defined at the position near the electronic elements71, which generate less amount of heat, may be relatively small. Thenumber of second air vents 766 near the primary electronic elements maybe relatively less. The second air vents 766 near the primary electronicelements may be less-densely distributed.

Further, a size of the first air vent 764 may be larger than a size ofthe second air vent 766 to increase an amount of returned airflow,improving the efficiency of the cooling fan 78.

12. Natural Air Convection

As shown in FIG. 32 and FIG. 33 , the electric control box 7 may includethe box body 72, the mounting plate 76, the heat dissipation member 6and the primary heating element 715.

The box body 72 defines the mounting cavity 721. The mounting plate 76is received in the mounting cavity 721, and the mounting cavity 721 isdivided into the first cavity 7212 and the second cavity 7214, and thefirst cavity 7212 and the second cavity 7214 are located on two sides ofthe mounting plate 76, respectively. The mounting plate 76 defines thefirst air vent 764 and the second air vent 766 spaced apart from thefirst air vent 764. The first air vent 764 and the second air vent 766are arranged in the vertical direction. At least a part of the heatdissipation member 6 is received in the first cavity 7212. The primaryheating element 715 is received in the second cavity 7214. The first airvent 764 and the second air vent 766 are communicated to the firstcavity 7212 and the second cavity 7214, and a circulating air flow forheat dissipation may be generated between the first cavity 7212 and thesecond cavity 7214 by taking a temperature difference between theprimary heating element 715 and the heat dissipation member 6.

In detail, the primary heating element 715 are received in the secondcavity 7214. The heat generated while the primary heating element 715 isoperating causes the temperature in the second cavity 7214 to increase.Since the hot air has a low density, the hot air naturally flowsupwardly and enters the first cavity 7212 through the first air vent 764located at the top of the second cavity 7214. The hot air contacts theheat dissipation member 6 and exchanges heat with the heat dissipationmember 6. The temperature of the hot air decreases, and the density ofthe air increases. The air naturally flows downwardly to a bottom of thefirst cavity 7212 under the gravitational force. Further, the air entersthe second cavity 7214 through the second air vent 766 to cool theprimary heating element 715. After exchanging heat with the primaryheating element 715, the hot air flows upwardly to the position wherethe first air vent 764 is defined. In this way, an internal circulatingairflow between the first cavity 7212 and the second cavity 7214 isgenerated.

In the present embodiment, the mounting plate 76 defines the first airvent 764 and the second air vent 766. The first air vent 764 and thesecond air vent 766 are communicated with the first cavity 7212 and thesecond cavity 7214, and are arranged in the vertical direction. The airmay circulate between the first cavity 7212 and the second cavity 7214due to the gravitational force applied to the air, and the air may cooldown the electronic elements 71 received in the second cavity 7214, andan overall temperature of the electric control box 7 may be reduced.Compared to taking the cooling fan 78 to supply air, the structure ofthe electric control box 7 in the present embodiment may be simpler, anassembling efficiency of the electric control box 7 may be increased,and the production cost of the electric control box 7 may be reduced.

Further, the heat dissipation member 6 may be arranged on an upper ofthe primary heating element 715 along the gravitation direction. Thatis, the heat dissipation member 6 may be arranged at a position near thetop of the first cavity 7212, and the primary heating element 715 may bearranged at a position near the bottom of the second cavity 7214. Inthis way, a distance between the heat dissipation member 6 and the firstair vent 764 may be reduced, and the hot air entering the first cavity7212 via the first air vent 764 may contacts the heat dissipation member6 and may be cooled quickly. The cooled air may naturally flowdownwardly due to the gravitational force. By reducing the distancebetween the primary heating element 715 and the second air vent 766, thehot air entering the second cavity 7214 through the second air vent 766may contact the primary heating element 715 and may be heated quickly,and the heated air may flow upwardly due to air buoyancy. In this way,the speed that the air circulates in the electric control box 7 may beincreased, and the heat dissipation efficiency may be improved.

Further, as shown in FIG. 33 , the secondary heating element 716 may bearranged inside the electric control box 7. The secondary heatingelement 716 may be received in the second cavity 7214 and may bethermal-conductively connected to the heat exchanging body 61. Theamount of heat generated by the secondary heating element 716 may beless than the amount of heat generated by the primary heating element715.

In detail, in the present embodiment, the primary heating element 715,which generates a large amount of heat, may be arranged near the secondair vent 766. On one hand, the cold air entering through the firstcavity 7212 may firstly contact the electronic element 71, whichgenerates the large amount of heat, to improve the efficiency ofdissipating heat from the electronic element 71. On the other hand, alarge temperature difference may be generated between the cold air andthe electronic element 71 which generates the large amount of heat, andthe cold air may be heated quickly and flow upwardly due to the airbuoyancy. The secondary heating element 716, which generates less amountof heat, may be arranged on and contact the heat exchanging body 61. Theheat exchanging body 61 may be configured to directly cool theelectronic element 71, which generates less amount of heat. In this way,the primary heating element 715, which generates large amount of heat,and the secondary heating element 716, which generates less amount ofheat, may be disposed in different regions, the electronic elements 71may be distributed more reasonably, and the internal space of theelectric control box 7 may be optimally utilized.

In some embodiments, the secondary heating element 716 is connected tothe heat exchanging body 61 through the heat dissipation fixing plate74, and the efficiency of assembling the secondary heating element 716may be improved.

Connection between the secondary heating element 716 and the heatexchanging body 61 may be the same as and may be referred to thedescription of the above-mentioned embodiments, and will not be repeatedherein.

In some embodiments, the heat dissipation member 6 may be arranged onthe outside of the electric control box 7, and at least a part of theheat dissipation member 6 may extend to the inside the first cavity7212.

Engagement between the heat dissipation member 6 and the electriccontrol box 7 may be the same as and referred to the description of theabove-mentioned embodiments, and will not be repeated herein.

Structures in the above various embodiments may be combined with eachother. It shall be understood that, the heat dissipation members 6 asdescribed in the above may be applied in the embodiments, heatdissipation members 6 in other forms may be applied. The presentdisclosure does not limit the structure of heat dissipation member 6applied in the embodiments.

The above description shows only embodiments of the present disclosure,and does not limit the scope of the present disclosure. Any equivalentstructure or equivalent process transformation performed based on thespecification and accompanying drawings, applied directly or indirectlyin other related fields, shall be equally covered by the scope of thepresent disclosure.

1. An electric control box, comprising: a box body, defining a mounting cavity; a mounting plate, received in the mounting cavity, wherein the mounting cavity is divided into a first cavity and a second cavity disposed on two sides of the mounting plate respectively; the mounting plate defines a first air vent and a second air vent spaced apart from the first air vent; and the first air vent and the second air vent are communicated with the first cavity and the second cavity; a heat dissipation member, at least partially received in the first cavity; an electronic element, received in the second cavity and thermal-conductively connected to the heat dissipation member; and a cooling fan, configured to supply air to drive air in the first cavity to flow into the second cavity through the first air vent.
 2. The electric control box according to claim 1, wherein the cooling fan is received in the first air vent.
 3. The electric control box according to claim 2, wherein a plane in which the cooling fan is located is co-planar with a plane in which the mounting plate is located.
 4. The electric control box according to claim 1, wherein a leeward side of the cooling fan faces the first air vent.
 5. The electric control box according to claim 1, wherein a plane in which the cooling fan is located is perpendicular to a plane in which the mounting plate is located.
 6. The electric control box according to claim 1, further defining a return air duct, wherein the return air duct is disposed between and communicated with the first air vent and the cooling fan, and the return air duct is configured to guide air from the first cavity to the cooling fan.
 7. The electric control box according to claim 1, further defining an air supply duct, wherein the air supply duct is connected to a side of the cooling fan away from a return air duct and is configured to direct air blown by the cooling fan, enabling the cooling fan to blow the air towards the electronic element.
 8. The electric control box according to claim 1, further comprising an air guiding cover, wherein the air guiding cover is disposed at a periphery of the cooling fan and is configured to guide the air blown by the cooling fan, enabling the cooling fan to blow the air towards the electronic element.
 9. The electric control box according to claim 1, wherein the cooling fan is a centrifugal fan.
 10. The electric control box according to claim 1, wherein the mounting plate is arranged with air guiding plates, and the air guiding plates are spaced apart from each other, and an air guiding channel is defined between the air guide plates to guide the air blown from the cooling fan.
 11. The electric control box according to claim 1, wherein the heat dissipation member comprises a heat exchanging body and a fluid-collecting tube assembly; the fluid-collecting tube assembly is configured to provide a cooling medium to the heat exchanging body; and at least part of the heat exchanging body is received in the first cavity.
 12. The electric control box according to claim 11, further comprising a heat dissipation fixing plate, wherein the heat dissipation fixing plate is arranged on the heat exchanging body, and the electronic element is arranged on the heat dissipation fixing plate to be thermal-conductively connected to the heat exchanging body.
 13. The electric control box according to claim 11, further comprising a heat dissipation fin, wherein the heat dissipation fin is arranged on the heat exchanging body.
 14. The electric control box according to claim 13, wherein the box body defines an assembly port communicating with the first cavity; the heat exchanging body is connected to an outer side wall of the box body; and the heat dissipation fin is connected to the heat exchanging body and is inserted into the first cavity through the assembly port.
 15. The electric control box according to claim 11, wherein the heat exchanging body comprises a first extension portion and a second extension portion; the second extension portion is connected to an end of the first extension portion and is bent towards a side of the first extension portion; and the electronic element is thermal-conductively connected to the first extension portion and/or the second extension portion.
 16. The electric control box according to claim 15, further comprising a heat dissipation fixing plate, wherein the heat dissipation fixing plate is arranged at the first extension portion and/or the second extension portion and is thermal-conductively connected to the first extension portion and/or the second extension portion, and the electronic element is arranged on the heat dissipation fixing plate.
 17. The electric control box according to claim 15, wherein the heat exchanging body further comprises a third extension portion, the third extension portion is bent towards and connected to the second extension portion; the first extension portion and the third extension portion are arranged side by side and spaced apart from each other; and the second extension portion is disposed between and connected to an end of the first extension portion and an end of the third extension portion adjacent to the end of the first extension portion.
 18. The electric control box according to claim 1, wherein the electronic element comprises a primary heating element and a secondary heating element, heat generated by the primary heating element is greater than heat generated by the secondary heating element, and a distance between the primary heating element and the first air vent is less than a distance between the secondary heating element and the first air vent.
 19. The electric control box according to claim 18, wherein the second air vent is disposed at an end of supplied air of the cooling fan and is disposed near the primary heating element.
 20. An air conditioning apparatus, comprising an air conditioning body and an electric control box, wherein the electric control box is detachably connected to the air conditioning body; and wherein the electric control box comprises: a box body, defining a mounting cavity; a mounting plate, received in the mounting cavity, wherein the mounting cavity is divided into a first cavity and a second cavity disposed on two sides of the mounting plate respectively; the mounting plate defines a first air vent and a second air vent spaced apart from the first air vent; and the first air vent and the second air vent are communicated with the first cavity and the second cavity; a heat dissipation member, at least partially received in the first cavity; an electronic element, received in the second cavity and thermal-conductively connected to the heat dissipation member; and a cooling fan, configured to supply air to drive air in the first cavity to flow into the second cavity through the first air vent. 